Table 1. Summary of the number of surveys undertaken in 2023, and the number of surveys examined in the estimation of spawning stock biomass (SSB) for the Atlantic herring 4VWX stock and coastal component complexes. Numbers in brackets indicate the number of surveys excluded from total biomass estimates.
| Spawning Grounds | Number of Surveys | Notes |
|---|---|---|
| Offshore Banks | 0 | |
| Scots Bay | 11 | |
| German Bank | 7 | |
| Seal Island | 7 | |
| Spectacle Buoy | 6 | |
| Trinity Ledge | 5 | |
| Little Hope | 6 | 4 used |
| Eastern Shore | 5 | 3 used |
| Glace Bay | 0 | |
| Total | 47 |
Table 2. Summary of completed herring acoustic surveys in 2023 with interval (days) between surveys on the same grounds, and the number of boats with acoustic systems.
| Location of Survey | Survey Date | Interval (days) | Acoustic Boats |
|---|---|---|---|
| Scots Bay #1 | 2023-05-22 | NA | 4 |
| Scots Bay #2 | 2023-06-06 | 15 | 8 |
| Scots Bay #3 | 2023-06-18 | 12 | 4 |
| Scots Bay #4 | 2023-07-02 | 14 | 6 |
| Scots Bay #5 | 2023-07-16 | 14 | 6 |
| Scots Bay #6 | 2023-07-30 | 14 | 7 |
| Scots Bay #7 | 2023-08-13 | 14 | 6 |
| Scots Bay #8 | 2023-08-27 | 14 | 8 |
| Scots Bay #9 | 2023-09-10 | 14 | 8 |
| Scots Bay #10 | 2023-09-24 | 14 | 4 |
| Scots Bay #11 | 2023-10-09 | 15 | 4 |
| Trinity Ledge #1 | 2023-08-06 | NA | 1 |
| Trinity Ledge #2 | 2023-08-16 | 10 | 1 |
| Trinity Ledge #3 | 2023-08-27 | 11 | 1 |
| Trinity Ledge #4 | 2023-09-08 | 12 | 1 |
| Trinity Ledge #5 | 2023-09-20 | 12 | 1 |
| Spec Buoy #1 | 2023-08-07 | NA | 1 |
| Spec Buoy #2 | 2023-08-17 | 10 | 1 |
| Spec Buoy #3 | 2023-08-28 | 11 | 1 |
| Spec Buoy #4 | 2023-09-03 | 6 | 1 |
| Spec Buoy #5 | 2023-09-12 | 9 | 1 |
| Spec Buoy #6 | 2023-09-22 | 10 | 1 |
| German Bank #1 | 2023-08-06 | NA | 5 |
| German Bank #2 | 2023-08-20 | 14 | 9 |
| German Bank #3 | 2023-09-03 | 14 | 9 |
| German Bank #4 | 2023-09-13 | 10 | 9 |
| German Bank #5 | 2023-09-27 | 14 | 7 |
| German Bank #6 | 2023-10-11 | 14 | 5 |
| German Bank #7 | 2023-10-24 | 13 | 8 |
| Seal Island #1 | 2023-08-07 | NA | 5 |
| Seal Island #2 | 2023-08-21 | 14 | 9 |
| Seal Island #3 | 2023-09-04 | 14 | 9 |
| Seal Island #4 | 2023-09-14 | 10 | 9 |
| Seal Island #5 | 2023-09-27 | 13 | 2 |
| Seal Island #6 | 2023-10-12 | 15 | 5 |
| Seal Island #7 | 2023-10-25 | 13 | 7 |
| Little Hope #1 | 2023-08-28 | NA | 2 |
| Little Hope #2 | 2023-09-13 | 16 | 4 |
| Little Hope #3 | 2023-09-26 | 13 | 4 |
| Little Hope #4 | 2023-10-07 | 11 | 2 |
| Little Hope #5 | 2023-10-17 | 10 | 2 |
| Little Hope #6 | 2023-10-30 | 13 | 1 |
| Eastern Shore #1 | 2023-09-23 | NA | 3 |
| Eastern Shore #2 | 2023-10-03 | 10 | 4 |
| Eastern Shore #3 | 2023-10-13 | 10 | 3 |
| Eastern Shore #4 | 2023-10-27 | 14 | 2 |
| Eastern Shore #5 | 2023-11-07 | 11 | 2 |
Figure. Trends in herring SSB (adjusted for turnover) from acoustic
surveys areas with 95% confidence intervals in Scots Bay (red) and
German Bank (black) areas.
Figure. Acoustic index of SSB (in thousands of metric tons)
(with 95% confidence intervals; black Line), the 3-year moving average
(red line), the overall average since 1999 (dashed purple line), and the
Limit Reference Point for the Southwest Nova Scotia/Bay of Fundy
spawning component (revised 2005–2010 German Bank and Scots Bay average;
dashed blue line).
Table. Summary of the 2023 Scots Bay spawning ground acoustic survey data and associated biomass estimates for Main Box, North Box, and East Box areas. This summary includes both systematic and ad-hoc surveys.
| Location | Date | Target Strength (dB/kg) | Area (km2) | Mean Sa (dB/m2) | Unadjusted Biomass (t) | Standard Error (t) | St. Err % | Adjusted Biomass (t) |
|---|---|---|---|---|---|---|---|---|
| Scots Bay #1 | 2023-05-22 | -35.5000 | 687 | -48.84 | 47,629 | 14,110 | 44 | 47,629 |
| Scots Bay #2 | 2023-06-06 | -35.0776 | 624 | -45.11 | 98,726 | 43,571 | 70 | 92,916 |
| Scots Bay #3 | 2023-06-18 | -35.0369 | 676 | -51.45 | 29,417 | 6,886 | 45 | 12,696 |
| Scots Bay #4 | 2023-07-02 | -34.7408 | 661 | -53.65 | 9,330 | 4,927 | 53 | 3,619 |
| Scots Bay #5 | 2023-07-16 | -35.5000 | 647 | -51.31 | 17,387 | 8,824 | 52 | 16,022 |
| Scots Bay #6 | 2023-07-30 | -35.5000 | 619 | -58.01 | 3,474 | 720 | 21 | 1,093 |
| Scots Bay #7 | 2023-08-13 | -35.5000 | 623 | -59.01 | 2,777 | 768 | 28 | 2,247 |
| Scots Bay #8 | 2023-08-27 | -35.1054 | 609 | -60.88 | 1,612 | 226 | 14 | 1,224 |
| Scots Bay #9 | 2023-09-10 | -35.1434 | 608 | -57.91 | 3,219 | 469 | 15 | 0 |
| Scots Bay #10 | 2023-09-24 | -34.8118 | 646 | -59.22 | 2,340 | 1,247 | 53 | 0 |
| Scots Bay #11 | 2023-10-09 | -35.5000 | 664 | -59.70 | 2,521 | 358 | 14 | 0 |
| Summary | 642 | -55.01 | 218,431 | 47,436 | 22 | 177,447 |
Figure. Plots of Transects and area buffer for each survey.
Figure. Length distribution used for calculation of TS for the Scots Bay acoustic surveys with proportions <23cm and >30cm shown as white and grey bars.
Figure. Herring maturity samples collected during Scots Bay surveys in 2023 to determine proportion of individuals spawning for Eastern Shore acoustic index of spawning stock biomass. Stage codes are: 1-2 Immature, 3-5 Ripening or Ripe. 6, Spawning, 7 Spent, and 8-9 Recovering.
Table. Summary of 2023 fish sampled for Scots Bay by survey date and location with TS estimate from samples and TS estimate for a 28 cm herring using the length/weight equation.
| Location of survey | Interval (days) | Date | No. of Len. Samp. | No. of Det. Samp. | No. Len/Wt Fish | No. of Fish Measured | Mean Length (mm) | Mean Weight (g) | Target Strength (dB/kg) | Wt 28 cm Fish (g) | TS 28 cm Fish (dB/kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Scots Bay #1 | May - 22 | -35.5000 | |||||||||
| Scots Bay #2 | 15 | Jun - 6 | 9 | 2 | 45 | 1769 | 277 | 159 | -35.0776 | 165 | -35.1435 |
| Scots Bay #3 | 12 | Jun - 18 | 9 | 3 | 59 | 1556 | 272 | 152 | -35.0369 | 168 | -35.2187 |
| Scots Bay #4 | 14 | Jul - 2 | 9 | 3 | 58 | 1723 | 243 | 114 | -34.7408 | 179 | -35.4909 |
| Scots Bay #5 | 14 | Jul - 16 | -35.5000 | ||||||||
| Scots Bay #6 | 14 | Jul - 30 | -35.5000 | ||||||||
| Scots Bay #7 | 14 | Aug - 13 | -35.5000 | ||||||||
| Scots Bay #8 | 14 | Aug - 27 | 12 | 6 | 158 | 2335 | 260 | 141 | -35.1054 | 176 | -35.4216 |
| Scots Bay #9 | 14 | Sep - 10 | 12 | 7 | 180 | 2277 | 262 | 145 | -35.1434 | 177 | -35.4273 |
| Scots Bay #10 | 14 | Sep - 24 | 6 | 2 | 56 | 1069 | 245 | 117 | -34.8118 | 175 | -35.3885 |
| Scots Bay #11 | 15 | Oct - 9 | -35.5000 |
NASC - Nautical Area Scattering Strength
Figure. Herring NASC’s by 2 nautical mile intervals during the 2023 Scots Bay acoustic surveys.
SSB - Spawning Stock Biomass
Figure. Spawning Stock Biomass (proportional to size of a bubble plot) in thousands from 1999 to 2022 Scots Bay acoustic survey by day in the year. Note that SSB on this figure have not been adjusted by the turnover equations and neighboring survey times may be temporally auto-correlated.
Work in Progress - Years with missing Bubbles have not been added to the database.
SSB - Spawning Stock Biomass
Figure. Spawning Stock Biomass (proportional to size of a bubble plot) in thousands from 1999 to 2022 Scots Bay acoustic survey by week number. SSB values were adjusted for turnover to decrease the chance of double counting. (0) indicates that a surveyed occurred, but due to double-counting these individuals were removed.
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-05-22 | BP_T02 | -35.5 | -55.5302 | 40.4911 | 0.0616 | 6,821.3667 |
| ScotsBayMainBox | 2023-05-22 | BP_T01 | -35.5 | -56.6896 | 39.2764 | 0.0486 | 5,223.2168 |
| ScotsBayMainBox | 2023-05-22 | FM_T01 | -35.5 | -52.2187 | 37.5104 | 0.1425 | 14,622.6584 |
| ScotsBayMainBox | 2023-05-22 | MS_T01 | -35.5 | -69.6278 | 48.5446 | 0.0020 | 265.5322 |
| ScotsBayMainBox | 2023-05-22 | SL_T01 | -35.5 | -60.0776 | 45.2203 | 0.0193 | 2,394.0513 |
| ScotsBayMainBox | 2023-05-22 | SL_T02 | -35.5 | -59.8633 | 39.9995 | 0.0230 | 2,515.1377 |
| ScotsBayNorthBox | 2023-05-24 | FM_T02 | -35.5 | -52.9524 | 18.1148 | 0.0490 | 1,349.2542 |
| ScotsBayNorthBox | 2023-05-24 | FM_T03 | -35.5 | -62.2752 | 16.3914 | 0.0063 | 157.6946 |
| ScotsBayNorthBox | 2023-05-24 | FM_T04 | -35.5 | -63.3631 | 14.8777 | 0.0054 | 122.7516 |
| ScotsBayEastBox | 2023-05-23 | MS_T02 | -35.5 | -50.6962 | 11.3603 | 0.1548 | 3,809.6107 |
| ScotsBayEastBox | 2023-05-23 | MS_T03 | -35.5 | -49.1044 | 13.6614 | 0.1857 | 5,496.1319 |
| ScotsBayEastBox | 2023-05-23 | MS_T04 | -35.5 | -50.6557 | 15.5720 | 0.1140 | 3,845.2732 |
| ScotsBayEastBox | 2023-05-23 | MS_T05 | -35.5 | -56.4782 | 17.5771 | 0.0264 | 1,006.1755 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-06-06 | C1_T01 | -35.0776 | -59.8055 | 44.6833 | 0.0384 | 2,099.7679 |
| ScotsBayMainBox | 2023-06-06 | C1_T02 | -35.0776 | -59.1550 | 37.8761 | 0.0526 | 2,439.0371 |
| ScotsBayMainBox | 2023-06-06 | FM_T01 | -35.0776 | -56.8549 | 42.3486 | 0.0798 | 4,142.1870 |
| ScotsBayMainBox | 2023-06-06 | FM_T02 | -35.0776 | -47.1917 | 35.7292 | 0.8757 | 38,331.3595 |
| ScotsBayMainBox | 2023-06-06 | LJ_T01 | -35.0776 | -58.9638 | 48.0756 | 0.0433 | 2,548.8148 |
| ScotsBayMainBox | 2023-06-06 | LJ_T02 | -35.0776 | -65.6217 | 41.8691 | 0.0107 | 550.2357 |
| ScotsBayMainBox | 2023-06-06 | LM_T01 | -35.0776 | -59.9810 | 47.9440 | 0.0343 | 2,016.6065 |
| ScotsBayMainBox | 2023-06-06 | LM_T02 | -35.0776 | -63.5482 | 40.4255 | 0.0179 | 886.9590 |
| ScotsBayMainBox | 2023-06-06 | MS_T01 | -35.0776 | -59.6004 | 44.6869 | 0.0402 | 2,201.3285 |
| ScotsBayMainBox | 2023-06-06 | MS_T02 | -35.0776 | -56.8050 | 38.9530 | 0.0878 | 4,190.0969 |
| ScotsBayMainBox | 2023-06-06 | SL_T01 | -35.0776 | -62.0799 | 46.8223 | 0.0217 | 1,243.7310 |
| ScotsBayMainBox | 2023-06-06 | SL_T02 | -35.0776 | -61.8864 | 39.6689 | 0.0268 | 1,300.4166 |
| ScotsBayNorthBox | 2023-06-06 | BP_T01 | -35.0776 | -58.2977 | 8.2731 | 0.0324 | 416.5925 |
| ScotsBayNorthBox | 2023-06-06 | BP_T02 | -35.0776 | -48.0319 | 17.7092 | 0.1607 | 4,428.8573 |
| ScotsBayNorthBox | 2023-06-06 | BP_T03 | -35.0776 | -59.1444 | 16.2430 | 0.0136 | 342.7967 |
| ScotsBayNorthBox | 2023-06-06 | BP_T04 | -35.0776 | -50.0360 | 13.9554 | 0.1285 | 2,791.7754 |
| ScotsBayEastBox | 2023-06-06 | TM_T01 | -35.0776 | -43.6471 | 12.0516 | 0.6834 | 17,616.1501 |
| ScotsBayEastBox | 2023-06-06 | TM_T02 | -35.0776 | -52.9532 | 13.6042 | 0.0710 | 2,066.8052 |
| ScotsBayEastBox | 2023-06-06 | TM_T03 | -35.0776 | -47.3050 | 15.8755 | 0.2235 | 7,587.8596 |
| ScotsBayEastBox | 2023-06-06 | TM_T04 | -35.0776 | -54.2749 | 17.7198 | 0.0402 | 1,524.5088 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-06-18 | BP_T01 | -35.0369 | -63.1418 | 45.8262 | 0.0085 | 1,045.8973 |
| ScotsBayMainBox | 2023-06-18 | BP_T02 | -35.0369 | -59.8669 | 40.1904 | 0.0205 | 2,223.2269 |
| ScotsBayMainBox | 2023-06-18 | LB_T01 | -35.0369 | -60.6936 | 43.1064 | 0.0158 | 1,837.8635 |
| ScotsBayMainBox | 2023-06-18 | LB_T02 | -35.0369 | -60.4537 | 37.5429 | 0.0192 | 1,942.2215 |
| ScotsBayMainBox | 2023-06-18 | LJ_T01 | -35.0369 | -63.0662 | 47.5836 | 0.0083 | 1,064.2767 |
| ScotsBayMainBox | 2023-06-18 | SL_T01 | -35.0369 | -54.6929 | 36.5731 | 0.0742 | 7,317.7521 |
| ScotsBayNorthBox | 2023-06-18 | SL_T02 | -35.0369 | -43.1683 | 18.7113 | 0.4282 | 9,289.5548 |
| ScotsBayNorthBox | 2023-06-18 | SL_T03 | -35.0369 | -60.2062 | 17.2153 | 0.0092 | 183.7423 |
| ScotsBayNorthBox | 2023-06-18 | SL_T04 | -35.0369 | -60.3768 | 16.1823 | 0.0094 | 176.6628 |
| ScotsBayEastBox | 2023-06-18 | LJ_T02 | -35.0369 | -60.1548 | 11.8681 | 0.0152 | 396.1830 |
| ScotsBayEastBox | 2023-06-18 | LJ_T03 | -35.0369 | -63.4445 | 14.3101 | 0.0059 | 185.7489 |
| ScotsBayEastBox | 2023-06-18 | LJ_T04 | -35.0369 | -55.2567 | 14.3738 | 0.0387 | 1,223.7881 |
| ScotsBayEastBox | 2023-06-18 | LJ_T05 | -35.0369 | -52.1025 | 17.9144 | 0.0641 | 2,530.0477 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-07-02 | BP_T01 | -34.7408 | -63.3656 | 46.2737 | 0.0086 | 907.8393 |
| ScotsBayMainBox | 2023-07-02 | BP_T02 | -34.7408 | -62.2418 | 37.5610 | 0.0138 | 1,175.9558 |
| ScotsBayMainBox | 2023-07-02 | C1_T01 | -34.7408 | -65.9747 | 43.8875 | 0.0050 | 497.8537 |
| ScotsBayMainBox | 2023-07-02 | C1_T02 | -34.7408 | -67.5984 | 35.4920 | 0.0043 | 342.5582 |
| ScotsBayMainBox | 2023-07-02 | LJ_T01 | -34.7408 | -63.5251 | 42.2521 | 0.0091 | 875.1141 |
| ScotsBayMainBox | 2023-07-02 | LJ_T02 | -34.7408 | -56.3503 | 37.6893 | 0.0534 | 4,566.0988 |
| ScotsBayMainBox | 2023-07-02 | TM_T01 | -34.7408 | -71.4137 | 48.1348 | 0.0013 | 142.3001 |
| ScotsBayNorthBox | 2023-07-02 | LB_T01 | -34.7408 | -61.9497 | 15.0293 | 0.0085 | 149.1510 |
| ScotsBayNorthBox | 2023-07-02 | LB_T02 | -34.7408 | -63.7483 | 16.0621 | 0.0053 | 98.5750 |
| ScotsBayNorthBox | 2023-07-02 | LB_T03 | -34.7408 | -65.7109 | 17.4957 | 0.0031 | 62.7334 |
| ScotsBayNorthBox | 2023-07-02 | LB_T04 | -34.7408 | -62.8196 | 18.9405 | 0.0055 | 122.0761 |
| ScotsBayEastBox | 2023-07-02 | SL_T01 | -34.7408 | -82.5111 | 12.1141 | 0.0001 | 4.7421 |
| ScotsBayEastBox | 2023-07-02 | SL_T02 | -34.7408 | -71.2286 | 14.0400 | 0.0017 | 63.7111 |
| ScotsBayEastBox | 2023-07-02 | SL_T03 | -34.7408 | -68.9678 | 16.1290 | 0.0025 | 107.2249 |
| ScotsBayEastBox | 2023-07-02 | SL_T04 | -34.7408 | -72.2354 | 18.9019 | 0.0010 | 50.5288 |
| ScotsBayEastBox | 2023-07-02 | TM_T02 | -34.7408 | -65.7943 | 43.5185 | 0.0019 | 222.6622 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-07-16 | FM_T01 | -35.5 | -59.1640 | 44.5981 | 0.0326 | 2,782.8711 |
| ScotsBayMainBox | 2023-07-16 | FM_T02 | -35.5 | -69.2041 | 37.7360 | 0.0038 | 275.7292 |
| ScotsBayMainBox | 2023-07-16 | LB_T01 | -35.5 | -59.4490 | 48.7703 | 0.0279 | 2,606.1329 |
| ScotsBayMainBox | 2023-07-16 | LB_T02 | -35.5 | -63.1391 | 41.7055 | 0.0140 | 1,114.2517 |
| ScotsBayMainBox | 2023-07-16 | LJ_T01 | -35.5 | -64.0231 | 46.2903 | 0.0103 | 909.0524 |
| ScotsBayMainBox | 2023-07-16 | LJ_T02 | -35.5 | -54.1330 | 39.4092 | 0.1176 | 8,863.2580 |
| ScotsBayMainBox | 2023-07-16 | SL_T01 | -35.5 | -68.4175 | 43.9903 | 0.0039 | 330.4783 |
| ScotsBayMainBox | 2023-07-16 | SL_T02 | -35.5 | -74.2713 | 35.7402 | 0.0013 | 85.8552 |
| ScotsBayNorthBox | 2023-07-16 | LM_T01 | -35.5 | -69.8791 | 19.3375 | 0.0013 | 29.9836 |
| ScotsBayNorthBox | 2023-07-16 | LM_T02 | -35.5 | -70.8926 | 17.4755 | 0.0011 | 23.7434 |
| ScotsBayNorthBox | 2023-07-16 | LM_T03 | -35.5 | -67.4222 | 16.0998 | 0.0027 | 52.7927 |
| ScotsBayNorthBox | 2023-07-16 | LM_T04 | -35.5 | -70.5090 | 14.3913 | 0.0015 | 25.9359 |
| ScotsBayEastBox | 2023-07-16 | C1_T01 | -35.5 | -73.8753 | 12.5077 | 0.0007 | 19.0031 |
| ScotsBayEastBox | 2023-07-16 | C1_T02 | -35.5 | -66.6044 | 13.7089 | 0.0035 | 101.3720 |
| ScotsBayEastBox | 2023-07-16 | C1_T03 | -35.5 | -70.1005 | 15.8534 | 0.0014 | 45.3218 |
| ScotsBayEastBox | 2023-07-16 | C1_T04 | -35.5 | -65.8438 | 20.5072 | 0.0028 | 120.7743 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-07-30 | C1_T01 | -35.5 | -64.5416 | 44.5949 | 0.0166 | 771.3970 |
| ScotsBayMainBox | 2023-07-30 | C1_T02 | -35.5 | -75.0556 | 39.1953 | 0.0017 | 68.5285 |
| ScotsBayMainBox | 2023-07-30 | FM_T01 | -35.5 | -66.9379 | 45.8371 | 0.0093 | 444.2669 |
| ScotsBayMainBox | 2023-07-30 | FM_T02 | -35.5 | -68.3461 | 40.5074 | 0.0076 | 321.2340 |
| ScotsBayMainBox | 2023-07-30 | LB_T01 | -35.5 | -69.4570 | 45.6941 | 0.0052 | 248.7311 |
| ScotsBayMainBox | 2023-07-30 | LB_T02 | -35.5 | -71.8497 | 39.0728 | 0.0035 | 143.3712 |
| ScotsBayMainBox | 2023-07-30 | LJ_T01 | -35.5 | -70.7757 | 46.9644 | 0.0038 | 183.5944 |
| ScotsBayMainBox | 2023-07-30 | LJ_T02 | -35.5 | -72.5046 | 40.5722 | 0.0029 | 123.3022 |
| ScotsBayMainBox | 2023-07-30 | LM_T01 | -35.5 | -66.1778 | 43.3320 | 0.0117 | 529.2426 |
| ScotsBayMainBox | 2023-07-30 | LM_T02 | -35.5 | -74.2890 | 37.2996 | 0.0021 | 81.7588 |
| ScotsBayMainBox | 2023-07-30 | MS_T01 | -35.5 | -71.9681 | 48.4266 | 0.0028 | 139.5152 |
| ScotsBayMainBox | 2023-07-30 | MS_T02 | -35.5 | -70.1927 | 42.5264 | 0.0047 | 209.9752 |
| ScotsBayMainBox | 2023-07-30 | SL_T01 | -35.5 | -72.7387 | 43.6110 | 0.0026 | 116.8336 |
| ScotsBayMainBox | 2023-07-30 | SL_T02 | -35.5 | -73.7614 | 36.2375 | 0.0024 | 92.3191 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-08-13 | C1_T01 | -35.5 | -69.4948 | 48.7992 | 0.0041 | 248.2411 |
| ScotsBayMainBox | 2023-08-13 | C1_T02 | -35.5 | -74.4031 | 40.8603 | 0.0016 | 80.1746 |
| ScotsBayMainBox | 2023-08-13 | FM_T01 | -35.5 | -64.0724 | 45.0841 | 0.0156 | 865.1842 |
| ScotsBayMainBox | 2023-08-13 | FM_T02 | -35.5 | -72.1917 | 38.1838 | 0.0028 | 133.4066 |
| ScotsBayMainBox | 2023-08-13 | LM_T01 | -35.5 | -65.8233 | 46.0690 | 0.0102 | 578.1189 |
| ScotsBayMainBox | 2023-08-13 | LM_T02 | -35.5 | -74.4309 | 39.4862 | 0.0016 | 79.6629 |
| ScotsBayMainBox | 2023-08-13 | MS_T01 | -35.5 | -71.7432 | 43.2743 | 0.0028 | 147.9206 |
| ScotsBayMainBox | 2023-08-13 | MS_T02 | -35.5 | -72.6733 | 35.9405 | 0.0027 | 119.4044 |
| ScotsBayMainBox | 2023-08-13 | SL_T01 | -35.5 | -71.1775 | 47.0114 | 0.0029 | 168.5015 |
| ScotsBayMainBox | 2023-08-13 | SL_T02 | -35.5 | -72.7273 | 40.7179 | 0.0024 | 117.9272 |
| ScotsBayMainBox | 2023-08-13 | TM_T01 | -35.5 | -70.9276 | 44.5111 | 0.0033 | 178.4785 |
| ScotsBayMainBox | 2023-08-13 | TM_T02 | -35.5 | -75.6406 | 37.7040 | 0.0013 | 60.2965 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-08-27 | BP_T01 | -35.1054 | -71.3421 | 42.3561 | 0.0038 | 144.8651 |
| ScotsBayMainBox | 2023-08-27 | BP_T02 | -35.1054 | -75.3100 | 34.4969 | 0.0019 | 58.1004 |
| ScotsBayMainBox | 2023-08-27 | C1_T01 | -35.1054 | -74.3107 | 46.3792 | 0.0017 | 73.1317 |
| ScotsBayMainBox | 2023-08-27 | C1_T02 | -35.1054 | -75.0496 | 39.5239 | 0.0017 | 61.6897 |
| ScotsBayMainBox | 2023-08-27 | FM_T01 | -35.1054 | -68.3551 | 43.9335 | 0.0073 | 288.1826 |
| ScotsBayMainBox | 2023-08-27 | FM_T02 | -35.1054 | -73.7701 | 37.6219 | 0.0024 | 82.8265 |
| ScotsBayMainBox | 2023-08-27 | LB_T01 | -35.1054 | -70.8547 | 48.1134 | 0.0037 | 162.0701 |
| ScotsBayMainBox | 2023-08-27 | LB_T02 | -35.1054 | -75.3127 | 41.4844 | 0.0015 | 58.0641 |
| ScotsBayMainBox | 2023-08-27 | LJ_T01 | -35.1054 | -71.1428 | 43.6781 | 0.0038 | 151.6688 |
| ScotsBayMainBox | 2023-08-27 | LJ_T02 | -35.1054 | -75.6957 | 36.7852 | 0.0016 | 53.1628 |
| ScotsBayMainBox | 2023-08-27 | LM_T01 | -35.1054 | -74.5725 | 46.4904 | 0.0016 | 68.8530 |
| ScotsBayMainBox | 2023-08-27 | LM_T02 | -35.1054 | -74.0606 | 39.8729 | 0.0021 | 77.4672 |
| ScotsBayMainBox | 2023-08-27 | MS_T01 | -35.1054 | -72.6647 | 47.3539 | 0.0025 | 106.8341 |
| ScotsBayMainBox | 2023-08-27 | MS_T02 | -35.1054 | -75.8623 | 40.5627 | 0.0014 | 51.1619 |
| ScotsBayMainBox | 2023-08-27 | SL_T01 | -35.1054 | -72.8580 | 45.4682 | 0.0025 | 102.1834 |
| ScotsBayMainBox | 2023-08-27 | SL_T02 | -35.1054 | -74.4072 | 39.5026 | 0.0020 | 71.5252 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-09-10 | BP_T01 | -35.1434 | -72.4448 | 43.9471 | 0.0028 | 113.1770 |
| ScotsBayMainBox | 2023-09-10 | BP_T02 | -35.1434 | -72.7819 | 35.5922 | 0.0033 | 104.7241 |
| ScotsBayMainBox | 2023-09-10 | C1_T01 | -35.1434 | -72.1014 | 45.0803 | 0.0030 | 122.4871 |
| ScotsBayMainBox | 2023-09-10 | C1_T02 | -35.1434 | -76.2078 | 38.1673 | 0.0014 | 47.5834 |
| ScotsBayMainBox | 2023-09-10 | FM_T01 | -35.1434 | -74.0172 | 46.6143 | 0.0019 | 78.7988 |
| ScotsBayMainBox | 2023-09-10 | FM_T02 | -35.1434 | -69.1134 | 40.4771 | 0.0067 | 243.7221 |
| ScotsBayMainBox | 2023-09-10 | LB_T01 | -35.1434 | -70.6187 | 42.5194 | 0.0045 | 172.3303 |
| ScotsBayMainBox | 2023-09-10 | LB_T02 | -35.1434 | -70.4444 | 36.0063 | 0.0055 | 179.3871 |
| ScotsBayMainBox | 2023-09-10 | LJ_T01 | -35.1434 | -66.3006 | 44.7707 | 0.0115 | 465.7790 |
| ScotsBayMainBox | 2023-09-10 | LJ_T02 | -35.1434 | -69.9765 | 38.4824 | 0.0057 | 199.7960 |
| ScotsBayMainBox | 2023-09-10 | LM_T01 | -35.1434 | -70.2484 | 46.6850 | 0.0044 | 187.6682 |
| ScotsBayMainBox | 2023-09-10 | LM_T02 | -35.1434 | -69.6311 | 39.7822 | 0.0060 | 216.3346 |
| ScotsBayMainBox | 2023-09-10 | MS_T01 | -35.1434 | -67.7150 | 45.7285 | 0.0081 | 336.3102 |
| ScotsBayMainBox | 2023-09-10 | MS_T02 | -35.1434 | -66.7560 | 38.6878 | 0.0120 | 419.4061 |
| ScotsBayMainBox | 2023-09-10 | SL_T01 | -35.1434 | -71.6492 | 48.0702 | 0.0031 | 135.9295 |
| ScotsBayMainBox | 2023-09-10 | SL_T02 | -35.1434 | -70.0710 | 41.9593 | 0.0052 | 195.4927 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-09-24 | C1_T01 | -34.8118 | -61.4503 | 42.8804 | 0.0169 | 1,401.1308 |
| ScotsBayMainBox | 2023-09-24 | C1_T02 | -34.8118 | -73.6001 | 35.8089 | 0.0012 | 85.4074 |
| ScotsBayMainBox | 2023-09-24 | FM_T01 | -34.8118 | -71.9660 | 47.9719 | 0.0013 | 124.4262 |
| ScotsBayMainBox | 2023-09-24 | FM_T02 | -34.8118 | -68.8315 | 38.9808 | 0.0034 | 256.0721 |
| ScotsBayMainBox | 2023-09-24 | LM_T01 | -34.8118 | -69.5751 | 46.2757 | 0.0024 | 215.7720 |
| ScotsBayMainBox | 2023-09-24 | LM_T02 | -34.8118 | -71.8668 | 39.5437 | 0.0017 | 127.3003 |
| ScotsBayMainBox | 2023-09-24 | MS_T01 | -34.8118 | -80.2143 | 45.2624 | 0.0002 | 18.6241 |
| ScotsBayMainBox | 2023-09-24 | MS_T02 | -34.8118 | -72.4570 | 37.4851 | 0.0015 | 111.1253 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| ScotsBayMainBox | 2023-10-09 | FM_T01 | -35.5 | -66.3781 | 42.4693 | 0.0065 | 542.2625 |
| ScotsBayMainBox | 2023-10-09 | FM_T02 | -35.5 | -67.9984 | 35.4947 | 0.0054 | 373.4024 |
| ScotsBayMainBox | 2023-10-09 | LB_T01 | -35.5 | -69.4278 | 43.9885 | 0.0031 | 268.6809 |
| ScotsBayMainBox | 2023-10-09 | LB_T02 | -35.5 | -71.0102 | 37.9985 | 0.0025 | 186.6377 |
| ScotsBayMainBox | 2023-10-09 | LJ_T01 | -35.5 | -69.9073 | 46.3641 | 0.0026 | 240.5964 |
| ScotsBayMainBox | 2023-10-09 | LJ_T02 | -35.5 | -68.3025 | 39.3921 | 0.0045 | 348.1517 |
| ScotsBayMainBox | 2023-10-09 | SL_T01 | -35.5 | -70.4164 | 49.3690 | 0.0022 | 213.9826 |
| ScotsBayMainBox | 2023-10-09 | SL_T02 | -35.5 | -68.3160 | 42.7254 | 0.0041 | 347.0657 |
Scots Bay survey #4 had >10% immature individuals. This resulted in a 70t reduction in the estimated observed spawning biomass for that survey.
Table. Summary of the 2023 German Bank spawning ground acoustic survey data and associated biomass estimates. Adjusted biomass numbers refer to adjustment for turnover.
| Location | Date | Target Strength (dB/kg) | Area (km2) | Mean Sa (dB/m2) | Unadjusted Biomass (t) | Standard Error (t) | St. Err % | Adjusted Biomass |
|---|---|---|---|---|---|---|---|---|
| German Bank #1 | 2023-08-06 | -35.5000 | 505 | -59.48 | 2,021 | 198 | 10 | 2,021 |
| German Bank #2 | 2023-08-20 | -35.1776 | 796 | -59.02 | 3,288 | 837 | 25 | 2,894 |
| German Bank #3 | 2023-09-03 | -35.2314 | 794 | -55.00 | 8,372 | 2,017 | 24 | 7,658 |
| German Bank #4 | 2023-09-13 | -35.0659 | 797 | -52.31 | 15,011 | 5,316 | 35 | 12,497 |
| German Bank #5 | 2023-09-27 | -35.0837 | 802 | -52.82 | 13,503 | 2,307 | 17 | 9,978 |
| German Bank #6 | 2023-10-11 | -35.5000 | 820 | -50.36 | 26,754 | 14,629 | 55 | 23,581 |
| German Bank #7 | 2023-10-24 | -35.5000 | 797 | -54.01 | 11,241 | 1,852 | 16 | 4,970 |
| Summary | 759 | -54.71 | 80,190 | 15,994 | 20 | 63,600 |
Figure. Plots of Transects and area buffer for each survey.
Figure. Length distribution used for calculation of TS for the German Bank acoustic surveys with proportions <23cm and >30cm shown as white and grey bars.
Figure. Length distribution used for calculation of TS for the Scots Bay acoustic surveys with proportions <23cm and >30cm shown as white and grey bars.
Figure. Herring maturity samples collected during German Bank surveys in 2023 to determine proportion of individuals spawning for Eastern Shore acoustic index of spawning stock biomass. Stage codes are: 1-2 Immature, 3-5 Ripening or Ripe. 6, Spawning, 7 Spent, and 8-9 Recovering.
Table. Summary of 2023 fish sampled for Scots Bay by survey date and location with TS estimate from samples and TS estimate for a 28 cm herring using the length/weight equation.
| Location of survey | Interval (days) | Date | No. of Len. Samp. | No. of Det. Samp. | No. Len/Wt Fish | No. of Fish Measured | Mean Length (mm) | Mean Weight (g) | Target Strength (dB/kg) | Wt 28 cm Fish (g) | TS 28 cm Fish (dB/kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| German Bank #1 | Aug - 6 | -35.5000 | |||||||||
| German Bank #2 | 14 | Aug - 20 | 2 | 2 | 49 | 370 | 285 | 173 | -35.1776 | 164 | -35.0931 |
| German Bank #3 | 14 | Sep - 3 | 14 | 5 | 136 | 2843 | 277 | 165 | -35.2314 | 171 | -35.2843 |
| German Bank #4 | 10 | Sep - 13 | 11 | 3 | 78 | 2283 | 280 | 163 | -35.0659 | 163 | -35.0659 |
| German Bank #5 | 14 | Sep - 27 | 2 | 1 | 29 | 351 | 280 | 163 | -35.0837 | 163 | -35.0837 |
| German Bank #6 | 14 | Oct - 11 | -35.5000 | ||||||||
| German Bank #7 | 13 | Oct - 24 | -35.5000 |
NASC - Nautical Area Scattering Strength
Figure. Herring NASC’s by 2 nautical mile intervals during the 2023 German Bank acoustic surveys.
SSB - Spawning Stock Biomass
Figure. Spawning Stock Biomass (proportional to size of a bubble plot) in thousands from 1999 to 2022 German Bank acoustic survey by day in the year. Note that SSB on this figure have not been adjusted by the turnover equations and neighboring survey times may be temporally auto-correlated.
Work in Progress - Years with missing Bubbles have not been added to the database.
SSB - Spawning Stock Biomass
Figure. Spawning Stock Biomass (proportional to size of a bubble plot) in thousands from 1999 to 2022 German Bank acoustic survey by week number. SSB values were adjusted for turnover to decrease the chance of double counting. (0) indicates that a surveyed occurred, but due to double-counting these individuals were removed.
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| German | 2023-08-06 | LB_T01 | -35.5 | -70.9765 | 37.9280 | 0.0029 | 143.0740 |
| German | 2023-08-06 | LB_T02 | -35.5 | -68.1202 | 38.4266 | 0.0054 | 276.1825 |
| German | 2023-08-06 | LJ_T01 | -35.5 | -68.4530 | 37.0676 | 0.0052 | 255.8090 |
| German | 2023-08-06 | LJ_T02 | -35.5 | -71.0088 | 36.8879 | 0.0029 | 142.0138 |
| German | 2023-08-06 | LM_T01 | -35.5 | -71.1854 | 37.3475 | 0.0028 | 136.3541 |
| German | 2023-08-06 | LM_T02 | -35.5 | -68.3195 | 37.6563 | 0.0053 | 263.7914 |
| German | 2023-08-06 | MS_T01 | -35.5 | -71.2936 | 39.1266 | 0.0026 | 133.0006 |
| German | 2023-08-06 | MS_T02 | -35.5 | -67.9299 | 39.7283 | 0.0055 | 288.5511 |
| German | 2023-08-06 | SL_T01 | -35.5 | -69.5373 | 38.8966 | 0.0039 | 199.2882 |
| German | 2023-08-06 | SL_T02 | -35.5 | -69.8975 | 39.3293 | 0.0035 | 183.4264 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| German | 2023-08-20 | BP_T01 | -35.1776 | -71.6732 | 36.5106 | 0.0043 | 178.3017 |
| German | 2023-08-20 | BP_T02 | -35.1776 | -73.0673 | 36.4864 | 0.0031 | 129.3427 |
| German | 2023-08-20 | C1_T01 | -35.1776 | -72.7958 | 40.6019 | 0.0030 | 137.6883 |
| German | 2023-08-20 | C1_T02 | -35.1776 | -74.3510 | 40.8576 | 0.0021 | 96.2450 |
| German | 2023-08-20 | FM_T01 | -35.1776 | -65.9782 | 38.5962 | 0.0149 | 661.6917 |
| German | 2023-08-20 | FM_T02 | -35.1776 | -71.9102 | 38.6699 | 0.0038 | 168.8308 |
| German | 2023-08-20 | LB_T01 | -35.1776 | -72.4858 | 38.5054 | 0.0033 | 147.8737 |
| German | 2023-08-20 | LB_T02 | -35.1776 | -76.0163 | 38.1939 | 0.0015 | 65.5913 |
| German | 2023-08-20 | LJ_T01 | -35.1776 | -71.9843 | 37.0997 | 0.0039 | 165.9762 |
| German | 2023-08-20 | LJ_T02 | -35.1776 | -77.8218 | 37.1928 | 0.0010 | 43.2803 |
| German | 2023-08-20 | LM_T01 | -35.1776 | -65.4757 | 38.1433 | 0.0170 | 742.8621 |
| German | 2023-08-20 | LM_T02 | -35.1776 | -70.6626 | 38.1207 | 0.0051 | 225.0148 |
| German | 2023-08-20 | MS_T01 | -35.1776 | -72.2806 | 38.9235 | 0.0035 | 155.0301 |
| German | 2023-08-20 | MS_T02 | -35.1776 | -77.4158 | 38.8820 | 0.0011 | 47.5215 |
| German | 2023-08-20 | SL_T01 | -35.1776 | -74.0867 | 40.5256 | 0.0022 | 102.2833 |
| German | 2023-08-20 | SL_T02 | -35.1776 | -75.8270 | 40.2508 | 0.0015 | 68.5125 |
| German | 2023-08-20 | TM_T01 | -35.1776 | -76.0614 | 37.7450 | 0.0015 | 64.9136 |
| German | 2023-08-20 | TM_T02 | -35.1776 | -74.7807 | 37.6671 | 0.0020 | 87.1784 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| German | 2023-09-03 | BP_T01 | -35.2314 | -70.4100 | 36.6752 | 0.0057 | 241.1131 |
| German | 2023-09-03 | BP_T02 | -35.2314 | -69.9981 | 36.7697 | 0.0063 | 265.1047 |
| German | 2023-09-03 | C1_T01 | -35.2314 | -65.6330 | 41.2128 | 0.0153 | 724.3127 |
| German | 2023-09-03 | C1_T02 | -35.2314 | -75.6782 | 40.2689 | 0.0016 | 71.6805 |
| German | 2023-09-03 | FM_T01 | -35.2314 | -65.7457 | 38.5012 | 0.0160 | 705.7552 |
| German | 2023-09-03 | FM_T02 | -35.2314 | -72.1440 | 38.2258 | 0.0037 | 161.7416 |
| German | 2023-09-03 | LB_T01 | -35.2314 | -73.3915 | 38.0773 | 0.0028 | 121.3602 |
| German | 2023-09-03 | LB_T02 | -35.2314 | -73.4541 | 37.8970 | 0.0028 | 119.6216 |
| German | 2023-09-03 | LJ_T01 | -35.2314 | -64.2196 | 36.4336 | 0.0240 | 1,002.9256 |
| German | 2023-09-03 | LJ_T02 | -35.2314 | -74.2585 | 36.7611 | 0.0024 | 99.3962 |
| German | 2023-09-03 | LM_T01 | -35.2314 | -67.3453 | 38.2167 | 0.0111 | 488.3051 |
| German | 2023-09-03 | LM_T02 | -35.2314 | -74.1206 | 37.9393 | 0.0024 | 102.6039 |
| German | 2023-09-03 | MS_T01 | -35.2314 | -62.7228 | 40.0943 | 0.0308 | 1,415.6173 |
| German | 2023-09-03 | MS_T02 | -35.2314 | -74.5298 | 39.6152 | 0.0021 | 93.3781 |
| German | 2023-09-03 | SL_T01 | -35.2314 | -61.5982 | 42.1744 | 0.0379 | 1,834.0381 |
| German | 2023-09-03 | SL_T02 | -35.2314 | -68.2257 | 40.3108 | 0.0086 | 398.7031 |
| German | 2023-09-03 | TM_T01 | -35.2314 | -67.6350 | 36.5908 | 0.0109 | 456.8009 |
| German | 2023-09-03 | TM_T02 | -35.2314 | -75.7890 | 37.0808 | 0.0016 | 69.8759 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| German | 2023-09-13 | BP_T01 | -35.0659 | -59.1435 | 36.0612 | 0.0741 | 3,115.1341 |
| German | 2023-09-13 | BP_T02 | -35.0659 | -73.9406 | 37.0204 | 0.0024 | 103.2210 |
| German | 2023-09-13 | C1_T01 | -35.0659 | -68.5533 | 40.1229 | 0.0076 | 356.8629 |
| German | 2023-09-13 | C1_T02 | -35.0659 | -69.0955 | 38.2997 | 0.0071 | 314.9762 |
| German | 2023-09-13 | FM_T01 | -35.0659 | -60.6605 | 38.0608 | 0.0495 | 2,196.7255 |
| German | 2023-09-13 | FM_T02 | -35.0659 | -71.9847 | 37.8787 | 0.0037 | 161.9418 |
| German | 2023-09-13 | LB_T01 | -35.0659 | -61.9081 | 38.1018 | 0.0371 | 1,648.2159 |
| German | 2023-09-13 | LB_T02 | -35.0659 | -73.8035 | 37.8068 | 0.0024 | 106.5310 |
| German | 2023-09-13 | LJ_T01 | -35.0659 | -69.8491 | 36.9246 | 0.0062 | 264.7979 |
| German | 2023-09-13 | LJ_T02 | -35.0659 | -63.2828 | 37.3127 | 0.0276 | 1,201.0101 |
| German | 2023-09-13 | LM_T01 | -35.0659 | -71.1584 | 37.8886 | 0.0044 | 195.8779 |
| German | 2023-09-13 | LM_T02 | -35.0659 | -78.5885 | 38.1589 | 0.0008 | 35.3981 |
| German | 2023-09-13 | MS_T02 | -35.0659 | -71.6358 | 38.2415 | 0.0039 | 175.4889 |
| German | 2023-09-13 | MS_T01 | -35.0659 | -57.5228 | 39.5512 | 0.0982 | 4,524.3039 |
| German | 2023-09-13 | SL_T01 | -35.0659 | -69.6523 | 39.7486 | 0.0060 | 277.0747 |
| German | 2023-09-13 | SL_T02 | -35.0659 | -73.0543 | 38.2011 | 0.0028 | 126.5899 |
| German | 2023-09-13 | TM_T01 | -35.0659 | -72.2583 | 37.3227 | 0.0035 | 152.0558 |
| German | 2023-09-13 | TM_T02 | -35.0659 | -76.6950 | 37.0725 | 0.0013 | 54.7432 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| German | 2023-09-27 | BP_T01 | -35.0837 | -66.7411 | 36.8188 | 0.0099 | 547.5570 |
| German | 2023-09-27 | BP_T02 | -35.0837 | -66.4347 | 37.0349 | 0.0106 | 587.5904 |
| German | 2023-09-27 | C1_T01 | -35.0837 | -59.4000 | 40.8282 | 0.0484 | 2,968.5538 |
| German | 2023-09-27 | C1_T02 | -35.0837 | -62.4173 | 39.6113 | 0.0249 | 1,481.8712 |
| German | 2023-09-27 | FM_T01 | -35.0837 | -62.6432 | 38.7138 | 0.0242 | 1,406.7554 |
| German | 2023-09-27 | FM_T02 | -35.0837 | -64.1141 | 38.3222 | 0.0174 | 1,002.6088 |
| German | 2023-09-27 | LB_T01 | -35.0837 | -65.0163 | 38.4429 | 0.0141 | 814.5381 |
| German | 2023-09-27 | LB_T02 | -35.0837 | -66.0709 | 37.9500 | 0.0112 | 638.9219 |
| German | 2023-09-27 | LJ_T01 | -35.0837 | -66.1840 | 37.1848 | 0.0111 | 622.4974 |
| German | 2023-09-27 | LJ_T02 | -35.0837 | -67.6761 | 37.2977 | 0.0079 | 441.4969 |
| German | 2023-09-27 | LM_T01 | -35.0837 | -63.8494 | 37.1149 | 0.0191 | 1,065.6087 |
| German | 2023-09-27 | LM_T02 | -35.0837 | -68.3709 | 37.4891 | 0.0067 | 376.2306 |
| German | 2023-09-27 | MS_T01 | -35.0837 | -64.3274 | 38.7327 | 0.0164 | 954.5468 |
| German | 2023-09-27 | MS_T02 | -35.0837 | -66.3877 | 38.3912 | 0.0103 | 593.9758 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| German | 2023-10-11 | C1_T01 | -35.5 | -65.6922 | 39.2416 | 0.0094 | 784.4814 |
| German | 2023-10-11 | C1_T02 | -35.5 | -72.9837 | 38.8177 | 0.0018 | 146.3635 |
| German | 2023-10-11 | LB_T01 | -35.5 | -62.1763 | 38.2677 | 0.0217 | 1,762.6659 |
| German | 2023-10-11 | LB_T02 | -35.5 | -59.9568 | 38.2545 | 0.0361 | 2,938.4423 |
| German | 2023-10-11 | LJ_T01 | -35.5 | -63.6637 | 37.0720 | 0.0159 | 1,251.4971 |
| German | 2023-10-11 | LJ_T02 | -35.5 | -70.7510 | 37.2694 | 0.0031 | 244.7390 |
| German | 2023-10-11 | MS_T01 | -35.5 | -52.6323 | 39.2302 | 0.1903 | 15,869.8063 |
| German | 2023-10-11 | MS_T02 | -35.5 | -61.9138 | 38.6679 | 0.0228 | 1,872.4656 |
| German | 2023-10-11 | SL_T01 | -35.5 | -64.1639 | 39.7106 | 0.0132 | 1,115.3409 |
| German | 2023-10-11 | SL_T02 | -35.5 | -65.7832 | 39.1285 | 0.0092 | 768.2037 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| German | 2023-10-24 | BP_T01 | -35.5 | -64.2276 | 38.1264 | 0.0217 | 1,068.0069 |
| German | 2023-10-24 | BP_T02 | -35.5 | -67.4716 | 39.6710 | 0.0099 | 506.0222 |
| German | 2023-10-24 | C1_T01 | -35.5 | -64.0163 | 39.0625 | 0.0223 | 1,121.2359 |
| German | 2023-10-24 | C1_T02 | -35.5 | -64.5135 | 40.5576 | 0.0191 | 999.9557 |
| German | 2023-10-24 | FM_T01 | -35.5 | -62.7178 | 36.7205 | 0.0319 | 1,512.0029 |
| German | 2023-10-24 | FM_T02 | -35.5 | -63.3922 | 38.3005 | 0.0262 | 1,294.5146 |
| German | 2023-10-24 | LB_T01 | -35.5 | -71.4112 | 38.0187 | 0.0042 | 204.2741 |
| German | 2023-10-24 | LB_T02 | -35.5 | -63.1927 | 39.0567 | 0.0269 | 1,355.3887 |
| German | 2023-10-24 | LJ_T01 | -35.5 | -68.1792 | 37.0306 | 0.0090 | 429.9384 |
| German | 2023-10-24 | LJ_T02 | -35.5 | -68.0688 | 36.3959 | 0.0094 | 441.0164 |
| German | 2023-10-24 | LM_T01 | -35.5 | -71.9376 | 37.8058 | 0.0037 | 180.9544 |
| German | 2023-10-24 | LM_T02 | -35.5 | -66.8743 | 37.9064 | 0.0119 | 580.6367 |
| German | 2023-10-24 | MS_T01 | -35.5 | -66.8419 | 38.0394 | 0.0119 | 584.9759 |
| German | 2023-10-24 | MS_T02 | -35.5 | -66.7925 | 40.3633 | 0.0114 | 591.6716 |
| German | 2023-10-24 | SL_T01 | -35.5 | -70.0941 | 40.2829 | 0.0053 | 276.6409 |
| German | 2023-10-24 | SL_T02 | -35.5 | -74.8066 | 40.5000 | 0.0018 | 93.4695 |
German Bank Survey #2 had >10% immature individuals. This resulted in a 2t reduction in the estimated observed spawning biomass for that survey.
Table. Summary of the 2023 Seal Island spawning ground acoustic survey data and associated biomass estimates.
| Location | Date | Interval (Days) | Target Strength (dB/kg) | Area (km2) | Mean Sa (dB/m2) | Biomass (t) | Standard Error (t) | St. Err % |
|---|---|---|---|---|---|---|---|---|
| Seal Island #1 | 2023-08-07 | -35.5000 | 300 | -60.59 | 929 | 177 | 19 | |
| Seal Island #2 | 2023-08-21 | 14 | -35.1776 | 270 | -59.97 | 897 | 181 | 20 |
| Seal Island #3 | 2023-09-04 | 14 | -35.0331 | 269 | -58.93 | 1,099 | 245 | 22 |
| Seal Island #4 | 2023-09-14 | 10 | -35.1239 | 267 | -53.32 | 4,045 | 2,507 | 62 |
| Seal Island #5 | 2023-09-27 | 13 | -34.4425 | 276 | -42.59 | 42,269 | 29,803 | 71 |
| Seal Island #6 | 2023-10-12 | 15 | -35.5000 | 280 | -48.33 | 14,607 | 9,918 | 68 |
| Seal Island #7 | 2023-10-25 | 13 | -35.5000 | 277 | -59.57 | 1,087 | 420 | 39 |
| Summary | 277 | -54.76 | 64,933 | 31,515 | 49 |
Figure. Length distribution used for calculation of TS for the Seal Island acoustic surveys with proportions <23cm and >30cm shown as white and grey bars.
Figure. Herring maturity samples collected during Seal Island surveys in 2023 to determine proportion of individuals spawning for Eastern Shore acoustic index of spawning stock biomass. Stage codes are: 1-2 Immature, 3-5 Ripening or Ripe. 6, Spawning, 7 Spent, and 8-9 Recovering.
Table. Summary of 2023 fish sampled for Seal Island by survey date and location with TS estimate from samples and TS estimate for a 28 cm herring using the length/weight equation.
| Location of survey | Interval (days) | Date | No. of Len. Samp. | No. of Det. Samp. | No. Len/Wt Fish | No. of Fish Measured | Mean Length (mm) | Mean Weight (g) | Target Strength (dB/kg) | Wt 28 cm Fish (g) | TS 28 cm Fish (dB/kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Seal Island #1 | Aug - 6 | -35.5000 | |||||||||
| Seal Island #2 | 14 | Aug - 20 | 3 | 1 | 18 | 709 | 242 | 104 | -34.3898 | 156 | -34.8926 |
| Seal Island #3 | 14 | Sep - 3 | -35.5000 | ||||||||
| Seal Island #4 | 10 | Sep - 13 | 3 | 1 | 30 | 590 | 277 | 158 | -35.0331 | 163 | -35.0903 |
| Seal Island #5 | 14 | Sep - 27 | 2 | 4 | 109 | 348 | 275 | 159 | -35.1239 | 168 | -35.2107 |
| Seal Island #6 | 14 | Oct - 11 | 5 | 1 | 24 | 864 | 272 | 133 | -34.4425 | 145 | -34.5734 |
| Seal Island #7 | 13 | Oct - 24 | -35.5000 |
NASC - Nautical Area Scattering Strength
Figure. Herring NASC’s by 2 nautical mile intervals during the 2023 Seal Island acoustic surveys.
SSB - Spawning Stock Biomass
Figure. Spawning Stock Biomass (proportional to size of a bubble plot) in thousands Seal Island acoustic survey by day in the year. Note that SSB on this figure have not been adjusted by the turnover equations and neighboring survey times may be temporally auto-correlated.
Work in Progress - Years with missing Bubbles have not been added to the database.
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SealIsland | 2023-08-07 | LB_T03 | -35.5 | -73.0091 | 29.6689 | 0.0018 | 53.2513 |
| SealIsland | 2023-08-07 | LB_T04 | -35.5 | -67.1008 | 29.5305 | 0.0069 | 207.5690 |
| SealIsland | 2023-08-07 | LJ_T03 | -35.5 | -73.1915 | 28.8043 | 0.0017 | 51.0616 |
| SealIsland | 2023-08-07 | LJ_T04 | -35.5 | -70.6319 | 28.3496 | 0.0032 | 92.0559 |
| SealIsland | 2023-08-07 | LM_T03 | -35.5 | -74.6162 | 29.6111 | 0.0012 | 36.7807 |
| SealIsland | 2023-08-07 | LM_T04 | -35.5 | -70.7562 | 29.1416 | 0.0030 | 89.4577 |
| SealIsland | 2023-08-07 | MS_T03 | -35.5 | -70.8380 | 30.2790 | 0.0029 | 87.7884 |
| SealIsland | 2023-08-07 | MS_T04 | -35.5 | -68.5671 | 30.3771 | 0.0048 | 148.0903 |
| SealIsland | 2023-08-07 | SL_T03 | -35.5 | -75.7467 | 29.8525 | 0.0009 | 28.3510 |
| SealIsland | 2023-08-07 | SL_T04 | -35.5 | -68.9720 | 29.9086 | 0.0044 | 134.9076 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SealIsland | 2023-08-21 | BP_T03 | -35.1776 | -66.6425 | 26.3407 | 0.0072 | 192.8002 |
| SealIsland | 2023-08-21 | C1_T03 | -35.1776 | -67.7364 | 30.9205 | 0.0047 | 149.8720 |
| SealIsland | 2023-08-21 | FM_T03 | -35.1776 | -68.2670 | 29.1013 | 0.0045 | 132.6367 |
| SealIsland | 2023-08-21 | LB_T03 | -35.1776 | -69.6957 | 30.3315 | 0.0031 | 95.4535 |
| SealIsland | 2023-08-21 | LJ_T03 | -35.1776 | -74.0583 | 28.7347 | 0.0012 | 34.9569 |
| SealIsland | 2023-08-21 | LM_T03 | -35.1776 | -73.2630 | 29.2421 | 0.0014 | 41.9819 |
| SealIsland | 2023-08-21 | MS_T03 | -35.1776 | -70.2779 | 29.9178 | 0.0027 | 83.4787 |
| SealIsland | 2023-08-21 | SL_T03 | -35.1776 | -73.8071 | 30.6465 | 0.0012 | 37.0386 |
| SealIsland | 2023-08-21 | TM_T03 | -35.1776 | -68.3937 | 29.1946 | 0.0043 | 128.8209 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SealIsland | 2023-09-04 | BP_T03 | -35.0331 | -64.5464 | 28.6408 | 0.0102 | 301.4167 |
| SealIsland | 2023-09-04 | C1_T03 | -35.0331 | -73.4055 | 30.0452 | 0.0013 | 39.1977 |
| SealIsland | 2023-09-04 | FM_T03 | -35.0331 | -67.2213 | 28.9514 | 0.0055 | 162.8097 |
| SealIsland | 2023-09-04 | LB_T03 | -35.0331 | -68.8585 | 29.0406 | 0.0037 | 111.6748 |
| SealIsland | 2023-09-04 | LJ_T03 | -35.0331 | -71.1205 | 28.1230 | 0.0023 | 66.3379 |
| SealIsland | 2023-09-04 | LM_T03 | -35.0331 | -67.5796 | 28.7158 | 0.0051 | 149.9145 |
| SealIsland | 2023-09-04 | MS_T03 | -35.0331 | -67.9362 | 29.5759 | 0.0045 | 138.0981 |
| SealIsland | 2023-09-04 | SL_T03 | -35.0331 | -71.1867 | 30.2489 | 0.0021 | 65.3343 |
| SealIsland | 2023-09-04 | TM_T03 | -35.0331 | -71.2328 | 28.7122 | 0.0022 | 64.6431 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SealIsland | 2023-09-14 | BP_T03 | -35.1239 | -66.7960 | 29.2201 | 0.0061 | 181.4843 |
| SealIsland | 2023-09-14 | C1_T03 | -35.1239 | -73.5724 | 29.7727 | 0.0013 | 38.1245 |
| SealIsland | 2023-09-14 | FM_T03 | -35.1239 | -68.5163 | 29.2007 | 0.0041 | 122.1262 |
| SealIsland | 2023-09-14 | LB_T03 | -35.1239 | -65.0308 | 28.9273 | 0.0093 | 272.4950 |
| SealIsland | 2023-09-14 | LJ_T03 | -35.1239 | -68.7906 | 28.7186 | 0.0039 | 114.6517 |
| SealIsland | 2023-09-14 | LM_T03 | -35.1239 | -55.1048 | 29.5083 | 0.0896 | 2,678.9364 |
| SealIsland | 2023-09-14 | MS_T03 | -35.1239 | -73.0273 | 29.8259 | 0.0014 | 43.2224 |
| SealIsland | 2023-09-14 | SL_T03 | -35.1239 | -66.7567 | 29.4330 | 0.0061 | 183.1337 |
| SealIsland | 2023-09-14 | TM_T03 | -35.1239 | -63.2509 | 28.4953 | 0.0142 | 410.5353 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SealIsland | 2023-09-27 | SL_T01 | -34.4425 | -69.2355 | 30.0099 | 0.0019 | 91.5902 |
| SealIsland | 2023-09-27 | SL_T02 | -34.4425 | -47.9517 | 30.0370 | 0.2610 | 12,309.3028 |
| SealIsland | 2023-09-27 | SL_T03 | -34.4425 | -64.9327 | 29.9484 | 0.0052 | 246.6812 |
| SealIsland | 2023-09-27 | TM_T01 | -34.4425 | -62.9589 | 28.9699 | 0.0085 | 388.6093 |
| SealIsland | 2023-09-27 | TM_T02 | -34.4425 | -44.2096 | 28.4381 | 0.6525 | 29,136.9362 |
| SealIsland | 2023-09-27 | TM_T03 | -34.4425 | -69.0167 | 28.4690 | 0.0022 | 96.3238 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SealIsland | 2023-10-12 | C1_T03 | -35.5 | -59.9365 | 30.4606 | 0.0174 | 1,009.4863 |
| SealIsland | 2023-10-12 | LB_T03 | -35.5 | -55.5358 | 28.9777 | 0.0504 | 2,780.7991 |
| SealIsland | 2023-10-12 | LJ_T03 | -35.5 | -49.8037 | 28.6899 | 0.1904 | 10,408.2611 |
| SealIsland | 2023-10-12 | MS_T03 | -35.5 | -67.8201 | 28.9917 | 0.0030 | 164.3388 |
| SealIsland | 2023-10-12 | SL_T03 | -35.5 | -66.1067 | 30.0130 | 0.0043 | 243.8252 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SealIsland | 2023-10-25 | C1_T03 | -35.5 | -69.1115 | 30.3741 | 0.0033 | 120.6494 |
| SealIsland | 2023-10-25 | FM_T03 | -35.5 | -70.9954 | 26.8493 | 0.0025 | 78.1875 |
| SealIsland | 2023-10-25 | LB_T03 | -35.5 | -69.4028 | 29.0308 | 0.0033 | 112.8233 |
| SealIsland | 2023-10-25 | LJ_T03 | -35.5 | -63.1736 | 27.8500 | 0.0143 | 473.4992 |
| SealIsland | 2023-10-25 | LM_T03 | -35.5 | -70.2707 | 30.8651 | 0.0025 | 92.3858 |
| SealIsland | 2023-10-25 | MS_T03 | -35.5 | -72.0227 | 31.3449 | 0.0017 | 61.7174 |
| SealIsland | 2023-10-25 | MS_T04 | -35.5 | -69.0813 | 25.9544 | 0.0039 | 121.4926 |
| SealIsland | 2023-10-25 | SL_T03 | -35.5 | -75.7731 | 31.4216 | 0.0007 | 26.0237 |
No additional notes for this area.
Table. Summary of the 2023 Trinity Ledge spawning ground acoustic survey data and associated biomass estimates. A maximum biomass estimate value is taken when that are less than 10 days, instead, a single value is used in the reported biomass estimates for 10 day intervals.
| Location | Date | Interval (days) | Target Strength (dB/kg) | Area (km2) | Mean Sa (dB/m2) | Biomass (t) | Standard Error (t) | St. Err % |
|---|---|---|---|---|---|---|---|---|
| Trinity Ledge #1 | 2023-08-06 | -35.9495 | 9 | -68.12 | 5 | 2 | 35 | |
| Trinity Ledge #2 | 2023-08-16 | 10 | -35.7477 | 16 | -53.39 | 272 | 131 | 48 |
| Trinity Ledge #3 | 2023-08-27 | 11 | -35.4667 | 13 | -42.76 | 2,369 | 3,736 | 158 |
| Trinity Ledge #4 | 2023-09-08 | 12 | -35.9495 | 14 | -54.01 | 225 | 288 | 128 |
| Trinity Ledge #5 | 2023-09-20 | 12 | -35.9495 | 27 | -43.83 | 4,380 | 3,018 | 69 |
| Summary | 16 | -52.42 | 7,251 | 4,813 | 66 |
Figure. Length distribution used for calculation of TS for the Trinity Ledge acoustic surveys with proportions <23cm and >30cm shown as white and grey bars.
Figure. Herring maturity samples collected during Trinity Ledge surveys in 2023 to determine proportion of individuals spawning for Eastern Shore acoustic index of spawning stock biomass. Stage codes are: 1-2 Immature, 3-5 Ripening or Ripe. 6, Spawning, 7 Spent, and 8-9 Recovering.
Table. Summary of 2023 fish sampled for Trinity Ledge by survey date and location with TS estimate from samples and TS estimate for a 28 cm herring using the length/weight equation.
| Location of survey | Interval (days) | Date | No. of Len. Samp. | No. of Det. Samp. | No. Len/Wt Fish | No. of Fish Measured | Mean Length (mm) | Mean Weight (g) | Target Strength (dB/kg) | Wt 28 cm Fish (g) | TS 28 cm Fish (dB/kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Trinity Ledge #1 | Aug - 6 | -35.5000 | |||||||||
| Trinity Ledge #2 | 10 | Aug - 16 | 1 | 2 | 55 | 45 | 278 | 169 | -35.2982 | 173 | -35.3378 |
| Trinity Ledge #3 | 11 | Aug - 27 | 1 | 3 | 87 | 59 | 272 | 152 | -35.0173 | 166 | -35.1563 |
| Trinity Ledge #4 | 12 | Sep - 8 | -35.5000 | ||||||||
| Trinity Ledge #5 | 12 | Sep - 20 | -35.5000 |
NASC - Nautical Area Scattering Strength
Figure. Herring NASC’s by 2 nautical mile intervals during the 2023 Trinity Ledge acoustic surveys.
SSB - Spawning Stock Biomass
Figure. Spawning Stock Biomass (proportional to size of a bubble plot) in thousands Trinity Ledge acoustic survey by day in the year. Note that SSB on this figure have not been adjusted by the turnover equations and neighboring survey times may be temporally auto-correlated.
Work in Progress - Years with missing Bubbles have not been added to the database.
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| TrinityLedgeTR1 | 2023-08-06 | DD_T01 | -35.9495 | -77.2608 | 3.1116 | 0.0005 | 0.6315 |
| TrinityLedgeTR1 | 2023-08-06 | DD_T02 | -35.9495 | -82.3699 | 2.9567 | 0.0002 | 0.1947 |
| TrinityLedgeTR1 | 2023-08-06 | DD_T03 | -35.9495 | -74.8731 | 2.8271 | 0.0010 | 1.0943 |
| TrinityLedgeTR1 | 2023-08-06 | DD_T04 | -35.9495 | -75.0288 | 2.7768 | 0.0010 | 1.0558 |
| TrinityLedgeTR1 | 2023-08-06 | DD_T05 | -35.9495 | -88.6096 | 2.7916 | 0.0000 | 0.0463 |
| TrinityLedgeTR1 | 2023-08-06 | DD_T06 | -35.9495 | -72.6161 | 2.8278 | 0.0017 | 1.8401 |
| TrinityLedgeTR1 | 2023-08-06 | DD_T07 | -35.9495 | -81.0278 | 2.5970 | 0.0003 | 0.2653 |
| TrinityLedgeTR1 | 2023-08-06 | DD_T08 | -35.9495 | -88.1115 | 2.7548 | 0.0000 | 0.0519 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| TrinityLedgeTR1 | 2023-08-16 | DD_T01 | -35.7477 | -82.6393 | 1.6067 | 0.0005 | 0.3230 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T02 | -35.7477 | -81.5126 | 1.7692 | 0.0006 | 0.4187 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T03 | -35.7477 | -93.5296 | 2.1237 | 0.0000 | 0.0263 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T04 | -35.7477 | -87.7982 | 2.1783 | 0.0001 | 0.0985 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T05 | -35.7477 | -94.1785 | 2.0242 | 0.0000 | 0.0227 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T06 | -35.7477 | -89.9912 | 2.1262 | 0.0001 | 0.0594 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T07 | -35.7477 | -93.5861 | 1.8646 | 0.0000 | 0.0260 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T08 | -35.7477 | -84.7478 | 2.1829 | 0.0002 | 0.1988 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T09 | -35.7477 | -66.4237 | 2.8935 | 0.0127 | 13.5129 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T10 | -35.7477 | -57.0319 | 2.7592 | 0.1158 | 117.4694 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T11 | -35.7477 | -63.2066 | 3.1595 | 0.0244 | 28.3438 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T12 | -35.7477 | -85.8933 | 3.2877 | 0.0001 | 0.1527 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T13 | -35.7477 | -63.4860 | 3.0091 | 0.0240 | 26.5774 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T14 | -35.7477 | -58.4809 | 3.0244 | 0.0757 | 84.1451 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T15 | -35.7477 | -83.6624 | 3.3637 | 0.0002 | 0.2552 |
| TrinityLedgeTR1 | 2023-08-16 | DD_T16 | -35.7477 | -84.4187 | 5.5618 | 0.0001 | 0.2144 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| TrinityLedgeTR1 | 2023-08-27 | DD_T01 | -35.4667 | -61.5730 | 4.5591 | 0.0186 | 31.0981 |
| TrinityLedgeTR1 | 2023-08-27 | DD_T02 | -35.4667 | -71.9602 | 2.0155 | 0.0039 | 2.8445 |
| TrinityLedgeTR1 | 2023-08-27 | DD_T03 | -35.4667 | -72.6644 | 2.6775 | 0.0025 | 2.4187 |
| TrinityLedgeTR1 | 2023-08-27 | DD_T04 | -35.4667 | -55.7358 | 2.8931 | 0.1125 | 119.2476 |
| TrinityLedgeTR1 | 2023-08-27 | DD_T05 | -35.4667 | -43.0542 | 2.2655 | 2.6650 | 2,211.1503 |
| TrinityLedgeTR1 | 2023-08-27 | DD_T06 | -35.4667 | -81.3763 | 5.6090 | 0.0002 | 0.3254 |
| TrinityLedgeTR1 | 2023-08-27 | DD_T07 | -35.4667 | -75.6915 | 6.0792 | 0.0005 | 1.2047 |
| TrinityLedgeTR1 | 2023-08-27 | DD_T08 | -35.4667 | -80.6642 | 6.0080 | 0.0002 | 0.3834 |
| TrinityLedgeTR1 | 2023-08-27 | DD_T09 | -35.4667 | -86.3950 | 2.5357 | 0.0001 | 0.1025 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| TrinityLedgeTR1 | 2023-09-08 | DD_T01 | -35.9495 | -79.4121 | 4.1796 | 0.0004 | 0.6494 |
| TrinityLedgeTR1 | 2023-09-08 | DD_T02 | -35.9495 | -79.3511 | 4.3389 | 0.0004 | 0.6586 |
| TrinityLedgeTR1 | 2023-09-08 | DD_T03 | -35.9495 | -56.2109 | 1.9320 | 0.1808 | 135.7196 |
| TrinityLedgeTR1 | 2023-09-08 | DD_T04 | -35.9495 | -86.8979 | 2.1719 | 0.0001 | 0.1159 |
| TrinityLedgeTR1 | 2023-09-08 | DD_T05 | -35.9495 | -81.6547 | 4.8770 | 0.0002 | 0.3875 |
| TrinityLedgeTR1 | 2023-09-08 | DD_T06 | -35.9495 | -58.3598 | 5.1359 | 0.0415 | 82.7471 |
| TrinityLedgeTR1 | 2023-09-08 | DD_T07 | -35.9495 | -70.9635 | 5.8541 | 0.0020 | 4.5434 |
| TrinityLedgeTR1 | 2023-09-08 | DD_T08 | -35.9495 | -83.4916 | 4.6845 | 0.0001 | 0.2538 |
| TrinityLedgeTR1 | 2023-09-08 | DD_T09 | -35.9495 | -84.8321 | 3.9173 | 0.0001 | 0.1864 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| TrinityLedgeTR1 | 2023-09-20 | DD_T01 | -35.9495 | -74.9401 | 8.6957 | 0.0009 | 3.3947 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T02 | -35.9495 | -80.4068 | 5.9775 | 0.0004 | 0.9641 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T03 | -35.9495 | -47.6642 | 6.6909 | 0.6548 | 1,812.9811 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T04 | -35.9495 | -81.0614 | 1.7657 | 0.0011 | 0.8292 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T05 | -35.9495 | -47.1696 | 3.9216 | 1.2519 | 2,031.6438 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T06 | -35.9495 | -53.8570 | 3.9349 | 0.2675 | 435.6227 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T07 | -35.9495 | -80.7286 | 2.0551 | 0.0011 | 0.8953 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T08 | -35.9495 | -60.7131 | 6.5773 | 0.0330 | 89.8461 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T09 | -35.9495 | -80.4460 | 6.7724 | 0.0003 | 0.9555 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T10 | -35.9495 | -81.3285 | 6.7177 | 0.0003 | 0.7798 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T11 | -35.9495 | -79.7163 | 6.3814 | 0.0004 | 1.1303 |
| TrinityLedgeTR1 | 2023-09-20 | DD_T12 | -35.9495 | -79.0100 | 5.5308 | 0.0006 | 1.3299 |
No additional notes for this area.
Table. Summary of the 2023 Spectacle Buoy spawning ground acoustic survey data and associated biomass estimates. A maximum biomass estimate value is taken when that are less than 10 days, instead, a single value is used in the reported biomass estimates for 10 day intervals.
| Location | Date | Interval (days) | Target Strength (dB/kg) | Area (km2) | Mean Sa (dB/m2) | Biomass (t) | Standard Error (t) | St. Err % |
|---|---|---|---|---|---|---|---|---|
| Spectacle Buoy #1 | 2023-08-07 | -35.9495 | 29 | -63.72 | 48 | 18 | 37 | |
| Spectacle Buoy #2 | 2023-08-17 | 10 | -35.9495 | 35 | -49.59 | 1,510 | 1,022 | 68 |
| Spectacle Buoy #3 | 2023-08-28 | 11 | -35.9495 | 31 | -50.52 | 1,071 | 383 | 36 |
| Spectacle Buoy #4 | 2023-09-03 | 6 | -35.9495 | 26 | -48.60 | 1,392 | 1,026 | 74 |
| Spectacle Buoy #5 | 2023-09-12 | 9 | -35.9495 | 22 | -55.90 | 226 | 108 | 48 |
| Spectacle Buoy #6 | 2023-09-22 | 10 | -35.9495 | 42 | -63.76 | 70 | 13 | 19 |
| Summary | 31 | -55.35 | 4,317 | 1,502 | 35 |
Table. Summary of the 2023 Eastern Shore spawning ground acoustic survey data and associated biomass estimates used towards an index of abundance. A maximum biomass estimate value is taken when that are less than 10 days, instead, a single value is used in the reported biomass estimates for 10 day intervals.
| Location | Date | Interval (days) | Target Strength (dB/kg) | Area (km2) | Mean Sa (dB/m2) | Biomass (t) | Standard Error (t) | St. Err % |
|---|---|---|---|---|---|---|---|---|
| Spectacle Buoy #1 | 2023-08-07 | -35.9495 | 29 | -63.72 | 48 | 18 | 37 | |
| Spectacle Buoy #2 | 2023-08-17 | 10 | -35.9495 | 35 | -49.59 | 1,510 | 1,022 | 68 |
| Spectacle Buoy #4 | 2023-09-03 | 17 | -35.9495 | 26 | -48.60 | 1,392 | 1,026 | 74 |
| Spectacle Buoy #5 | 2023-09-12 | 9 | -35.9495 | 22 | -55.90 | 226 | 108 | 48 |
| Spectacle Buoy #6 | 2023-09-22 | 10 | -35.9495 | 42 | -63.76 | 70 | 13 | 19 |
| Summary | 31 | -56.31 | 3,245 | 1,452 | 45 |
Figure. Length distribution used for calculation of TS for the Spectacle Buoy acoustic surveys with proportions <23cm and >30cm shown as white and grey bars.
Figure. Herring maturity samples collected during Spectacle Buoy surveys in 2023 to determine proportion of individuals spawning for Spectacle Buoy acoustic index of spawning stock biomass. Stage codes are: 1-2 Immature, 3-5 Ripening or Ripe. 6, Spawning, 7 Spent, and 8-9 Recovering.
Table. Summary of 2023 fish sampled for Spectacle Buoy by survey date and location with TS estimate from samples and TS estimate for a 28 cm herring using the length/weight equation.
| Location of survey | Interval (days) | Date | No. of Len. Samp. | No. of Det. Samp. | No. Len/Wt Fish | No. of Fish Measured | Mean Length (mm) | Mean Weight (g) | Target Strength (dB/kg) | Wt 28 cm Fish (g) | TS 28 cm Fish (dB/kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Spec. Buoy #1 | Aug - 7 | -35.5000 | |||||||||
| Spec. Buoy #2 | 10 | Aug - 17 | 1 | 1 | 32 | 73 | 252 | 123 | -34.7766 | 177 | -35.4387 |
| Spec. Buoy #3 | 11 | Aug - 28 | 1 | 1 | 28 | 60 | 268 | 150 | -35.1096 | 171 | -35.2905 |
| Spec. Buoy #4 | 6 | Sep - 3 | 1 | 1 | 31 | 53 | 273 | 156 | -35.1081 | 169 | -35.2251 |
| Spec. Buoy #5 | 9 | Sep - 12 | 1 | 1 | 26 | 44 | 272 | 161 | -35.2656 | 176 | -35.4121 |
| Spec. Buoy #6 | 10 | Sep - 22 | -35.5000 |
NASC - Nautical Area Scattering Strength
Figure. Herring NASC’s by 2 nautical mile intervals during the 2023 Spectacle Buoy acoustic surveys.
SSB - Spawning Stock Biomass
Figure. Spawning Stock Biomass (proportional to size of a bubble plot) in thousands Spectacle Buoy acoustic survey by day in the year. Note that SSB on this figure have not been adjusted by the turnover equations and neighboring survey times may be temporally auto-correlated.
Work in Progress - Years with missing Bubbles have not been added to the database.
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SpecBuoySP1 | 2023-08-07 | DD_T01 | -35.9495 | -69.9284 | 11.2823 | 0.0026 | 11.5456 |
| SpecBuoySP1 | 2023-08-07 | DD_T02 | -35.9495 | -67.4132 | 11.2283 | 0.0047 | 20.6032 |
| SpecBuoySP1 | 2023-08-07 | DD_T03 | -35.9495 | -73.3622 | 10.9785 | 0.0012 | 5.2364 |
| SpecBuoySP1 | 2023-08-07 | DD_T04 | -35.9495 | -78.7861 | 11.2381 | 0.0003 | 1.5019 |
| SpecBuoySP1 | 2023-08-07 | DD_T05 | -35.9495 | -78.9474 | 10.7794 | 0.0003 | 1.4471 |
| SpecBuoySP1 | 2023-08-07 | DD_T06 | -35.9495 | -71.9607 | 10.4313 | 0.0018 | 7.2309 |
| SpecBuoySP1 | 2023-08-07 | DD_T07 | -35.9495 | -82.4206 | 7.7893 | 0.0002 | 0.6504 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SpecBuoySP1 | 2023-08-17 | DD_T01 | -35.9495 | -63.9674 | 11.9157 | 0.0096 | 55.0628 |
| SpecBuoySP1 | 2023-08-17 | DD_T02 | -35.9495 | -84.4108 | 10.2258 | 0.0001 | 0.4972 |
| SpecBuoySP1 | 2023-08-17 | DD_T03 | -35.9495 | -83.8380 | 11.1378 | 0.0001 | 0.5673 |
| SpecBuoySP1 | 2023-08-17 | DD_T04 | -35.9495 | -50.3565 | 12.5454 | 0.2099 | 1,264.5825 |
| SpecBuoySP1 | 2023-08-17 | DD_T05 | -35.9495 | -58.8024 | 12.2787 | 0.0307 | 180.8664 |
| SpecBuoySP1 | 2023-08-17 | DD_T06 | -35.9495 | -72.3607 | 11.4778 | 0.0014 | 7.9712 |
| SpecBuoySP1 | 2023-08-17 | DD_T07 | -35.9495 | -90.8277 | 3.0528 | 0.0001 | 0.1135 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SpecBuoySP1 | 2023-08-28 | DD_T01 | -35.9495 | -69.2558 | 10.3476 | 0.0031 | 14.3362 |
| SpecBuoySP1 | 2023-08-28 | DD_T02 | -35.9495 | -67.6834 | 10.2813 | 0.0044 | 20.5909 |
| SpecBuoySP1 | 2023-08-28 | DD_T03 | -35.9495 | -64.2297 | 10.4429 | 0.0097 | 45.6086 |
| SpecBuoySP1 | 2023-08-28 | DD_T04 | -35.9495 | -57.0546 | 11.8828 | 0.0443 | 237.9902 |
| SpecBuoySP1 | 2023-08-28 | DD_T05 | -35.9495 | -55.0554 | 12.3695 | 0.0674 | 377.1129 |
| SpecBuoySP1 | 2023-08-28 | DD_T06 | -35.9495 | -55.0700 | 12.5353 | 0.0663 | 375.8471 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SpecBuoySP1 | 2023-09-03 | DD_T01 | -35.9495 | -74.8492 | 9.4849 | 0.0009 | 3.2981 |
| SpecBuoySP1 | 2023-09-03 | DD_T02 | -35.9495 | -77.3566 | 10.0874 | 0.0005 | 1.8515 |
| SpecBuoySP1 | 2023-09-03 | DD_T03 | -35.9495 | -73.4306 | 9.7339 | 0.0012 | 4.5723 |
| SpecBuoySP1 | 2023-09-03 | DD_T04 | -35.9495 | -75.1196 | 9.7675 | 0.0008 | 3.0990 |
| SpecBuoySP1 | 2023-09-03 | DD_T05 | -35.9495 | -68.7057 | 10.3492 | 0.0035 | 13.5711 |
| SpecBuoySP1 | 2023-09-03 | DD_T06 | -35.9495 | -51.0731 | 12.0140 | 0.1725 | 786.8255 |
| SpecBuoySP1 | 2023-09-03 | DD_T07 | -35.9495 | -52.4074 | 6.0002 | 0.2541 | 578.6866 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SpecBuoySP1 | 2023-09-12 | DD_T01 | -35.9495 | -89.1759 | 8.1070 | 0.0000 | 0.1061 |
| SpecBuoySP1 | 2023-09-12 | DD_T02 | -35.9495 | -82.2599 | 8.0016 | 0.0002 | 0.5216 |
| SpecBuoySP1 | 2023-09-12 | DD_T03 | -35.9495 | -81.8036 | 8.3082 | 0.0002 | 0.5794 |
| SpecBuoySP1 | 2023-09-12 | DD_T04 | -35.9495 | -58.9155 | 8.8599 | 0.0319 | 112.6720 |
| SpecBuoySP1 | 2023-09-12 | DD_T05 | -35.9495 | -60.7399 | 8.9680 | 0.0207 | 74.0256 |
| SpecBuoySP1 | 2023-09-12 | DD_T06 | -35.9495 | -63.7005 | 9.2000 | 0.0102 | 37.4381 |
| SpecBuoySP1 | 2023-09-12 | DD_T07 | -35.9495 | -83.4245 | 4.5140 | 0.0002 | 0.3989 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| SpecBuoySP1 | 2023-09-22 | DD_T01 | -35.9495 | -74.8955 | 7.0373 | 0.0014 | 5.3612 |
| SpecBuoySP1 | 2023-09-22 | DD_T02 | -35.9495 | -74.8266 | 11.6107 | 0.0008 | 5.4469 |
| SpecBuoySP1 | 2023-09-22 | DD_T03 | -35.9495 | -71.9993 | 12.0969 | 0.0016 | 10.4443 |
| SpecBuoySP1 | 2023-09-22 | DD_T04 | -35.9495 | -74.8969 | 12.1469 | 0.0008 | 5.3595 |
| SpecBuoySP1 | 2023-09-22 | DD_T05 | -35.9495 | -69.0012 | 11.8850 | 0.0032 | 20.8299 |
| SpecBuoySP1 | 2023-09-22 | DD_T06 | -35.9495 | -70.6906 | 12.0951 | 0.0021 | 14.1173 |
| SpecBuoySP1 | 2023-09-22 | DD_T07 | -35.9495 | -73.1273 | 9.2657 | 0.0016 | 8.0553 |
No additional notes for this area.
Table. Summary of the 2023 Little Hope spawning ground acoustic survey data and associated biomass estimates. A maximum biomass estimate value is taken when that are less than 10 days, instead, a single value is used in the reported biomass estimates for 10 day intervals.
| Location | Date | Interval (days) | Target Strength (dB/kg) | Area (km2) | Mean Sa (dB/m2) | Biomass (t) | Standard Error (t) | St. Err % |
|---|---|---|---|---|---|---|---|---|
| Little Hope #1 | 2023-08-28 | -35.3990 | 8 | -48.53 | 4,693 | 118 | 30 | |
| Little Hope #2 | 2023-09-13 | 16 | -35.3661 | 14 | -48.12 | 23,458 | 371 | 50 |
| Little Hope #3 | 2023-09-26 | 13 | -35.3911 | 3 | -43.21 | 18,115 | 139 | 26 |
| Little Hope #4 | 2023-10-07 | 11 | -35.1643 | 1 | -54.74 | 911 | 3 | 23 |
| Little Hope #5 | 2023-10-17 | 10 | -35.9495 | 6 | -54.65 | 19,476 | 19 | 23 |
| Little Hope #6 | 2023-10-30 | 13 | -35.9495 | 4 | -39.18 | 1,920 | 314 | 16 |
| Summary | 6 | -48.07 | 68,573 | 7,324 | 11 |
Figure. Length distribution used for calculation of TS for the Little Hope acoustic surveys with proportions <23cm and >30cm shown as white and grey bars.
Figure. Herring maturity samples collected during Little Hope surveys in 2023 to determine proportion of individuals spawning for Little Hope acoustic index of spawning stock biomass. Stage codes are: 1-2 Immature, 3-5 Ripening or Ripe. 6, Spawning, 7 Spent, and 8-9 Recovering.
Table. Summary of 2023 fish sampled for Little Hope by survey date and location with TS estimate from samples and TS estimate for a 28 cm herring using the length/weight equation.
| Location of survey | Interval (days) | Date | No. of Len. Samp. | No. of Det. Samp. | No. Len/Wt Fish | No. of Fish Measured | Mean Length (mm) | Mean Weight (g) | Target Strength (dB/kg) | Wt 28 cm Fish (g) | TS 28 cm Fish (dB/kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Little Hope #1 | Aug - 28 | 1 | 1 | 30 | 104 | 285 | 164 | -34.9496 | 153 | -34.8163 | |
| Little Hope #2 | 16 | Sep - 13 | 1 | 1 | 29 | 101 | 275 | 151 | -34.9167 | 161 | -35.0254 |
| Little Hope #3 | 13 | Sep - 26 | 1 | 1 | 27 | 298 | 179 | -34.9417 | 154 | -34.8355 | |
| Little Hope #4 | 10 | Oct - 6 | 1 | 1 | 27 | 102 | 277 | 147 | -34.7149 | 152 | -34.7704 |
| Little Hope #5 | 11 | Oct - 17 | -35.5000 | ||||||||
| Little Hope #6 | 13 | Oct - 30 | -35.5000 |
NASC - Nautical Area Scattering Strength
Figure. Herring NASC’s by 2 nautical mile intervals during the 2023 Little Hope acoustic surveys.
SSB - Spawning Stock Biomass
Figure. Spawning Stock Biomass (proportional to size of a bubble plot) in thousands Little Hope acoustic survey by day in the year. Note that SSB on this figure have not been adjusted by the turnover equations and neighboring survey times may be temporally auto-correlated.
Work in Progress - Years with missing Bubbles have not been added to the database.
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| LittleHopeLH1 | 2023-08-28 | AS_T01 | -35.399 | -61.7397 | 1.9565 | 0.0195 | 18.8246 |
| LittleHopeLH1 | 2023-08-28 | AS_T02 | -35.399 | -58.6368 | 2.6964 | 0.0289 | 38.4606 |
| LittleHopeLH1 | 2023-08-28 | AS_T03 | -35.399 | -55.8602 | 2.0855 | 0.0708 | 72.8906 |
| LittleHopeLH1 | 2023-08-28 | AS_T04 | -35.399 | -57.3567 | 2.6902 | 0.0389 | 51.6437 |
| LittleHopeLH1 | 2023-08-28 | AS_T05 | -35.399 | -55.2550 | 3.3278 | 0.0510 | 83.7908 |
| LittleHopeLH1 | 2023-08-28 | AS_T06 | -35.399 | -53.6499 | 2.0079 | 0.1223 | 121.2570 |
| LittleHopeLH1 | 2023-08-28 | AS_T07 | -35.399 | -65.8490 | 1.6492 | 0.0090 | 7.3080 |
| LittleHopeLH2 | 2023-08-29 | SH_T01 | -35.399 | -59.1628 | 1.7559 | 0.0569 | 34.0733 |
| LittleHopeLH2 | 2023-08-29 | SH_T02 | -35.399 | -39.9030 | 2.9840 | 2.8233 | 2,873.4085 |
| LittleHopeLH2 | 2023-08-29 | SH_T03 | -35.399 | -55.9998 | 4.1034 | 0.0504 | 70.5843 |
| LittleHopeLH2 | 2023-08-29 | SH_T04 | -35.399 | -58.5206 | 4.1615 | 0.0278 | 39.5035 |
| LittleHopeLH2 | 2023-08-29 | SH_T05 | -35.399 | -57.4867 | 4.3141 | 0.0341 | 50.1212 |
| LittleHopeLH2 | 2023-08-29 | SH_T06 | -35.399 | -58.4275 | 3.8931 | 0.0304 | 40.3589 |
| LittleHopeLH2 | 2023-08-29 | SH_T07 | -35.399 | -61.5209 | 2.5532 | 0.0227 | 19.7973 |
| LittleHopeLH3 | 2023-08-28 | AS_T08 | -35.399 | -53.5863 | 3.8480 | 0.0926 | 123.0459 |
| LittleHopeLH3 | 2023-08-28 | AS_T09 | -35.399 | -50.9028 | 4.0622 | 0.1627 | 228.2532 |
| LittleHopeLH3 | 2023-08-28 | AS_T10 | -35.399 | -50.3784 | 3.9015 | 0.1911 | 257.5450 |
| LittleHopeLH3 | 2023-08-28 | AS_T11 | -35.399 | -51.9204 | 3.0685 | 0.1704 | 180.5729 |
| LittleHopeLH3 | 2023-08-28 | AS_T12 | -35.399 | -53.2357 | 3.1431 | 0.1229 | 133.3905 |
| LittleHopeLH3 | 2023-08-28 | AS_T13 | -35.399 | -51.1003 | 3.2769 | 0.1927 | 218.1041 |
| LittleHopeLH3 | 2023-08-28 | AS_T14 | -35.399 | -59.6518 | 2.1644 | 0.0407 | 30.4447 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| LittleHopeLH1 | 2023-09-13 | SH_T01 | -35.3661 | -52.7162 | 2.1795 | 0.1966 | 259.5942 |
| LittleHopeLH1 | 2023-09-13 | SH_T02 | -35.3661 | -54.4477 | 2.3305 | 0.1234 | 174.2375 |
| LittleHopeLH1 | 2023-09-13 | SH_T03 | -35.3661 | -57.4181 | 4.0665 | 0.0357 | 87.9246 |
| LittleHopeLH1 | 2023-09-13 | SH_T04 | -35.3661 | -56.4399 | 3.3627 | 0.0541 | 110.1345 |
| LittleHopeLH1 | 2023-09-13 | SH_T05 | -35.3661 | -59.2211 | 4.5149 | 0.0212 | 58.0499 |
| LittleHopeLH1 | 2023-09-13 | SH_T06 | -35.3661 | -60.2722 | 4.0252 | 0.0187 | 45.5718 |
| LittleHopeLH1 | 2023-09-13 | SH_T07 | -35.3661 | -66.0440 | 2.8020 | 0.0071 | 12.0645 |
| LittleHopeLH2 | 2023-09-14 | AS_T01 | -35.3661 | -64.7335 | 1.1602 | 0.0286 | 11.5418 |
| LittleHopeLH2 | 2023-09-14 | AS_T02 | -35.3661 | -54.9079 | 1.8915 | 0.1684 | 110.8741 |
| LittleHopeLH2 | 2023-09-14 | AS_T03 | -35.3661 | -49.0182 | 1.7699 | 0.6985 | 430.3245 |
| LittleHopeLH2 | 2023-09-14 | AS_T04 | -35.3661 | -41.3380 | 4.2658 | 1.6989 | 2,522.4210 |
| LittleHopeLH2 | 2023-09-14 | AS_T05 | -35.3661 | -39.4154 | 4.2726 | 2.6408 | 3,927.2216 |
| LittleHopeLH2 | 2023-09-14 | AS_T06 | -35.3661 | -41.8560 | 4.0130 | 1.6028 | 2,238.8304 |
| LittleHopeLH2 | 2023-09-14 | AS_T07a | -35.3661 | -56.9538 | 1.0935 | 0.1819 | 69.2220 |
| LittleHopeLH2 | 2023-09-14 | AS_T07b | -35.3661 | -44.2298 | 2.4368 | 1.5282 | 1,296.1171 |
| LittleHopeLH2 | 2023-09-14 | AS_T08 | -35.3661 | -44.9616 | 1.7194 | 1.8299 | 1,095.1208 |
| LittleHopeLH2 | 2023-09-14 | AS_T09 | -35.3661 | -48.7762 | 1.3226 | 0.9883 | 454.9874 |
| LittleHopeLH2 | 2023-09-14 | AS_T10 | -35.3661 | -50.6207 | 1.1281 | 0.7577 | 297.5408 |
| LittleHopeLH2 | 2023-09-14 | AS_T11 | -35.3661 | -50.9439 | 1.3217 | 0.6004 | 276.2030 |
| LittleHopeLH2 | 2023-09-14 | AS_T12 | -35.3661 | -52.7322 | 1.7641 | 0.2980 | 182.9776 |
| LittleHopeLH2 | 2023-09-14 | AS_T13 | -35.3661 | -69.2518 | 0.5053 | 0.0232 | 4.0779 |
| LittleHopeLH3 | 2023-09-14 | SH_T08 | -35.3661 | -59.3592 | 0.8073 | 0.0727 | 39.7832 |
| LittleHopeLH3 | 2023-09-14 | SH_T09 | -35.3661 | -50.6249 | 3.0836 | 0.1423 | 297.2589 |
| LittleHopeLH3 | 2023-09-14 | SH_T10 | -35.3661 | -49.6065 | 2.9770 | 0.1863 | 375.8116 |
| LittleHopeLH3 | 2023-09-14 | SH_T11 | -35.3661 | -52.5817 | 2.5729 | 0.1087 | 189.4290 |
| LittleHopeLH3 | 2023-09-14 | SH_T12 | -35.3661 | -51.0134 | 2.7816 | 0.1442 | 271.8207 |
| LittleHopeLH3 | 2023-09-14 | SH_T13 | -35.3661 | -57.8575 | 2.5037 | 0.0331 | 56.2168 |
| LittleHopeLH4 | 2023-09-13 | E2_T01 | -35.3661 | -57.2442 | 4.6456 | 0.0890 | 229.2241 |
| LittleHopeLH4 | 2023-09-13 | E2_T02 | -35.3661 | -56.5891 | 5.7458 | 0.0837 | 266.5449 |
| LittleHopeLH4 | 2023-09-13 | E2_T03 | -35.3661 | -51.6828 | 11.1710 | 0.1332 | 824.8939 |
| LittleHopeLH4 | 2023-09-13 | E2_T04 | -35.3661 | -48.3594 | 9.1144 | 0.3509 | 1,773.1459 |
| LittleHopeLH4 | 2023-09-13 | E2_T05 | -35.3661 | -48.5917 | 6.2820 | 0.4826 | 1,680.7883 |
| LittleHopeLH4 | 2023-09-13 | E2_T06 | -35.3661 | -54.8355 | 6.8970 | 0.1044 | 399.1480 |
| LittleHopeLH4 | 2023-09-13 | E2_T07 | -35.3661 | -47.7144 | 6.6856 | 0.5550 | 2,057.0600 |
| LittleHopeLH4 | 2023-09-13 | E2_T08 | -35.3661 | -58.1969 | 6.7869 | 0.0489 | 184.0741 |
| LittleHopeLH4 | 2023-09-13 | E2_T09 | -35.3661 | -56.1990 | 4.5508 | 0.1156 | 291.5958 |
| LittleHopeLH4 | 2023-09-13 | E2_T10 | -35.3661 | -64.2742 | 1.8398 | 0.0445 | 45.4221 |
| LittleHopeLH5 | 2023-09-14 | E8_T10 | -35.3661 | -54.3393 | 0.6455 | 0.1869 | 40.8277 |
| LittleHopeLH5 | 2023-09-14 | E8_T12 | -35.3661 | -51.3134 | 1.0597 | 0.2285 | 81.9500 |
| LittleHopeLH5 | 2023-09-14 | E8_T13 | -35.3661 | -52.8745 | 1.1949 | 0.1414 | 57.2057 |
| LittleHopeLH5 | 2023-09-14 | E8_T14 | -35.3661 | -53.0655 | 1.0758 | 0.1503 | 54.7445 |
| LittleHopeLH5 | 2023-09-14 | E8_T15 | -35.3661 | -54.1892 | 1.2243 | 0.1020 | 42.2641 |
| LittleHopeLH5 | 2023-09-14 | E8_T16 | -35.3661 | -54.2860 | 1.2337 | 0.0990 | 41.3324 |
| LittleHopeLH5 | 2023-09-14 | E8_T17 | -35.3661 | -51.4664 | 1.4205 | 0.1645 | 79.1127 |
| LittleHopeLH5 | 2023-09-14 | E8_T18 | -35.3661 | -53.6316 | 1.5176 | 0.0935 | 48.0539 |
| LittleHopeLH5 | 2023-09-14 | E8_T19 | -35.3661 | -65.2956 | 0.1502 | 0.0645 | 3.2759 |
| LittleHopeLH6 | 2023-09-14 | E8_T01 | -35.3661 | -62.3226 | 1.3553 | 0.0297 | 6.4957 |
| LittleHopeLH6 | 2023-09-14 | E8_T02 | -35.3661 | -62.2772 | 1.7611 | 0.0231 | 6.5640 |
| LittleHopeLH6 | 2023-09-14 | E8_T03 | -35.3661 | -61.0219 | 2.1628 | 0.0251 | 8.7640 |
| LittleHopeLH6 | 2023-09-14 | E8_T04 | -35.3661 | -59.8631 | 2.6082 | 0.0272 | 11.4441 |
| LittleHopeLH6 | 2023-09-14 | E8_T05 | -35.3661 | -51.6037 | 3.0322 | 0.1568 | 76.6514 |
| LittleHopeLH6 | 2023-09-14 | E8_T06 | -35.3661 | -47.5752 | 2.9330 | 0.4100 | 193.8075 |
| LittleHopeLH6 | 2023-09-14 | E8_T07 | -35.3661 | -56.5231 | 1.8585 | 0.0824 | 24.6933 |
| LittleHopeLH6 | 2023-09-14 | E8_T08 | -35.3661 | -56.2824 | 1.9046 | 0.0850 | 26.1006 |
| LittleHopeLH6 | 2023-09-14 | E8_T09 | -35.3661 | -61.8402 | 2.3810 | 0.0189 | 7.2588 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| LittleHopeLH1 | 2023-09-26 | AS_T01 | -35.3911 | -46.4871 | 4.4070 | 0.2348 | 247.6004 |
| LittleHopeLH1 | 2023-09-26 | AS_T02 | -35.3911 | -47.6368 | 4.5254 | 0.1755 | 190.0110 |
| LittleHopeLH1 | 2023-09-26 | AS_T03 | -35.3911 | -50.9233 | 4.3862 | 0.0849 | 89.1516 |
| LittleHopeLH2 | 2023-09-27 | AS_T04 | -35.3911 | -44.5976 | 5.6801 | 0.3688 | 382.5551 |
| LittleHopeLH2 | 2023-09-27 | AS_T05 | -35.3911 | -46.0851 | 5.6918 | 0.2613 | 271.6123 |
| LittleHopeLH2 | 2023-09-27 | AS_T06 | -35.3911 | -44.8818 | 6.0790 | 0.3228 | 358.3234 |
| LittleHopeLH3 | 2023-09-26 | SH_T01 | -35.3911 | -58.2427 | 1.7508 | 0.0652 | 50.5147 |
| LittleHopeLH3 | 2023-09-26 | SH_T02 | -35.3911 | -44.8750 | 2.0885 | 1.1863 | 1,096.9308 |
| LittleHopeLH3 | 2023-09-26 | SH_T03 | -35.3911 | -46.2881 | 2.5803 | 0.6935 | 792.2765 |
| LittleHopeLH3 | 2023-09-26 | SH_T04 | -35.3911 | -42.4842 | 2.3944 | 1.7943 | 1,902.2310 |
| LittleHopeLH3 | 2023-09-26 | SH_T05 | -35.3911 | -45.4462 | 1.9760 | 1.0993 | 961.7460 |
| LittleHopeLH3 | 2023-09-26 | SH_T06 | -35.3911 | -49.4750 | 2.0192 | 0.4254 | 380.3458 |
| LittleHopeLH3 | 2023-09-26 | SH_T07 | -35.3911 | -50.4359 | 2.1413 | 0.3216 | 304.8567 |
| LittleHopeLH3 | 2023-09-26 | SH_T08 | -35.3911 | -46.6895 | 2.1697 | 0.7519 | 722.3188 |
| LittleHopeLH3 | 2023-09-26 | SH_T09 | -35.3911 | -49.6681 | 1.4408 | 0.5703 | 363.8126 |
| LittleHopeLH3 | 2023-09-26 | SH_T10 | -35.3911 | -52.1168 | 1.8502 | 0.2527 | 207.0161 |
| LittleHopeLH3 | 2023-09-26 | SH_T11 | -35.3911 | -52.0959 | 1.5882 | 0.2958 | 208.0133 |
| LittleHopeLH4 | 2023-09-27 | SH_T12 | -35.3911 | -52.8999 | 0.6805 | 0.2204 | 32.6170 |
| LittleHopeLH4 | 2023-09-27 | SH_T13 | -35.3911 | -37.4570 | 0.8814 | 5.9588 | 1,142.1933 |
| LittleHopeLH4 | 2023-09-27 | SH_T14 | -35.3911 | -36.2607 | 1.1894 | 5.8156 | 1,504.4205 |
| LittleHopeLH4 | 2023-09-27 | SH_T15 | -35.3911 | -41.7311 | 1.4067 | 1.3953 | 426.9026 |
| LittleHopeLH4 | 2023-09-27 | SH_T16 | -35.3911 | -40.2044 | 1.3262 | 2.1036 | 606.7275 |
| LittleHopeLH4 | 2023-09-27 | SH_T17 | -35.3911 | -40.0589 | 1.2919 | 2.2330 | 627.3974 |
| LittleHopeLH4 | 2023-09-27 | SH_T18 | -35.3911 | -52.2779 | 1.0938 | 0.1582 | 37.6399 |
| LittleHopeLH4 | 2023-09-27 | SH_T19 | -35.3911 | -67.4011 | 0.5808 | 0.0092 | 1.1570 |
| LittleHopeLH5 | 2023-09-26 | E2_T01 | -35.3911 | -46.6998 | 3.4013 | 1.1383 | 135.9740 |
| LittleHopeLH5 | 2023-09-26 | E2_T02 | -35.3911 | -43.3664 | 3.3573 | 2.4845 | 292.9509 |
| LittleHopeLH5 | 2023-09-26 | E2_T03 | -35.3911 | -40.1381 | 7.3147 | 2.3981 | 616.0608 |
| LittleHopeLH5 | 2023-09-26 | E2_T04 | -35.3911 | -39.5219 | 7.0424 | 2.8705 | 709.9756 |
| LittleHopeLH5 | 2023-09-26 | E2_T05 | -35.3911 | -45.4962 | 5.5179 | 0.9257 | 179.3968 |
| LittleHopeLH5 | 2023-09-26 | E2_T06 | -35.3911 | -40.0445 | 5.3224 | 3.3675 | 629.4774 |
| LittleHopeLH5 | 2023-09-26 | E2_T07 | -35.3911 | -42.4477 | 5.6983 | 1.8087 | 361.9672 |
| LittleHopeLH5 | 2023-09-26 | E2_T08 | -35.3911 | -49.4737 | 5.3050 | 0.3853 | 71.7895 |
| LittleHopeLH5 | 2023-09-26 | E2_T09 | -35.3911 | -51.8006 | 5.1815 | 0.2309 | 42.0126 |
| LittleHopeLH5 | 2023-09-26 | E2_T10 | -35.3911 | -55.5493 | 4.1901 | 0.1204 | 17.7217 |
| LittleHopeLH6 | 2023-09-27 | E8_T01 | -35.3911 | -50.3106 | 1.1516 | 0.4441 | 59.2072 |
| LittleHopeLH6 | 2023-09-27 | E8_T02 | -35.3911 | -48.7721 | 1.5965 | 0.4566 | 84.3779 |
| LittleHopeLH6 | 2023-09-27 | E8_T03 | -35.3911 | -49.9145 | 1.6976 | 0.3301 | 64.8606 |
| LittleHopeLH6 | 2023-09-27 | E8_T04 | -35.3911 | -46.4678 | 2.1962 | 0.5642 | 143.4347 |
| LittleHopeLH6 | 2023-09-27 | E8_T05 | -35.3911 | -43.5460 | 2.0089 | 1.2087 | 281.0862 |
| LittleHopeLH6 | 2023-09-27 | E8_T06 | -35.3911 | -44.2799 | 2.5327 | 0.8096 | 237.3826 |
| LittleHopeLH6 | 2023-09-27 | E8_T07 | -35.3911 | -40.9878 | 1.9609 | 2.2318 | 506.5894 |
| LittleHopeLH6 | 2023-09-27 | E8_T08 | -35.3911 | -39.3712 | 1.7620 | 3.6037 | 735.0497 |
| LittleHopeLH6 | 2023-09-27 | E8_T09 | -35.3911 | -52.2863 | 0.9703 | 0.3344 | 37.5665 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| LittleHopeLH1 | 2023-10-07 | E8_T01 | -35.1643 | -63.6981 | 0.4904 | 0.0154 | 1.5283 |
| LittleHopeLH1 | 2023-10-07 | E8_T02 | -35.1643 | -66.4232 | 0.7291 | 0.0055 | 0.8160 |
| LittleHopeLH1 | 2023-10-07 | E8_T03 | -35.1643 | -60.4069 | 0.8236 | 0.0195 | 3.2609 |
| LittleHopeLH1 | 2023-10-07 | E8_T04 | -35.1643 | -60.4236 | 0.9695 | 0.0165 | 3.2483 |
| LittleHopeLH1 | 2023-10-07 | E8_T05 | -35.1643 | -62.2154 | 0.9586 | 0.0111 | 2.1502 |
| LittleHopeLH1 | 2023-10-07 | E8_T06 | -35.1643 | -66.4245 | 0.8310 | 0.0048 | 0.8158 |
| LittleHopeLH1 | 2023-10-07 | E8_T07 | -35.1643 | -72.3170 | 0.5808 | 0.0018 | 0.2100 |
| LittleHopeLH2 | 2023-10-06 | SH_T01 | -35.1643 | -55.8283 | 0.9769 | 0.0643 | 9.3581 |
| LittleHopeLH2 | 2023-10-06 | SH_T02 | -35.1643 | -46.0898 | 1.4352 | 0.4121 | 88.1124 |
| LittleHopeLH2 | 2023-10-06 | SH_T03 | -35.1643 | -37.2894 | 1.4335 | 3.1298 | 668.4593 |
| LittleHopeLH2 | 2023-10-06 | SH_T04 | -35.1643 | -48.2605 | 1.2669 | 0.2832 | 53.4530 |
| LittleHopeLH2 | 2023-10-06 | SH_T05 | -35.1643 | -49.4655 | 1.2799 | 0.2124 | 40.5009 |
| LittleHopeLH2 | 2023-10-06 | SH_T06 | -35.1643 | -55.1949 | 0.9262 | 0.0785 | 10.8275 |
| LittleHopeLH3 | 2023-10-06 | SH_T07 | -35.1643 | -61.2222 | 2.6095 | 0.0110 | 2.7027 |
| LittleHopeLH3 | 2023-10-06 | SH_T08 | -35.1643 | -52.8839 | 2.6684 | 0.0735 | 18.4345 |
| LittleHopeLH3 | 2023-10-06 | SH_T09 | -35.1643 | -57.5964 | 3.1223 | 0.0212 | 6.2284 |
| LittleHopeLH3 | 2023-10-06 | SH_T10 | -35.1643 | -66.0363 | 3.1974 | 0.0030 | 0.8920 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| LittleHopeLH1 | 2023-10-17 | AS_T01 | -35.9495 | -77.2833 | 0.4846 | 0.0020 | 0.4493 |
| LittleHopeLH1 | 2023-10-17 | AS_T02 | -35.9495 | -68.4619 | 1.4789 | 0.0049 | 3.4248 |
| LittleHopeLH1 | 2023-10-17 | AS_T03 | -35.9495 | -62.8752 | 2.0043 | 0.0132 | 12.3970 |
| LittleHopeLH1 | 2023-10-17 | AS_T04 | -35.9495 | -60.0901 | 2.5248 | 0.0199 | 23.5412 |
| LittleHopeLH1 | 2023-10-17 | AS_T05 | -35.9495 | -60.3506 | 2.3117 | 0.0204 | 22.1704 |
| LittleHopeLH1 | 2023-10-17 | AS_T06 | -35.9495 | -65.8244 | 2.7009 | 0.0050 | 6.2863 |
| LittleHopeLH1 | 2023-10-17 | AS_T07 | -35.9495 | -62.3246 | 1.5062 | 0.0199 | 14.0727 |
| LittleHopeLH2 | 2023-10-17 | E8_T01 | -35.9495 | -68.3147 | 0.9552 | 0.0046 | 1.0723 |
| LittleHopeLH2 | 2023-10-17 | E8_T02 | -35.9495 | -36.8985 | 1.1683 | 5.2057 | 1,485.7159 |
| LittleHopeLH2 | 2023-10-17 | E8_T03 | -35.9495 | -36.5521 | 1.6289 | 4.0438 | 1,609.0775 |
| LittleHopeLH2 | 2023-10-17 | E8_T04 | -35.9495 | -44.1267 | 1.7712 | 0.6501 | 281.2661 |
| LittleHopeLH2 | 2023-10-17 | E8_T05 | -35.9495 | -44.0987 | 1.5505 | 0.7474 | 283.0842 |
| LittleHopeLH2 | 2023-10-17 | E8_T06 | -35.9495 | -57.3414 | 0.4932 | 0.1114 | 13.4167 |
| LittleHopeLH3 | 2023-10-18 | E8_T07 | -35.9495 | -62.1053 | 1.1761 | 0.0199 | 5.8519 |
| LittleHopeLH3 | 2023-10-18 | E8_T08 | -35.9495 | -59.9127 | 1.4286 | 0.0271 | 9.6951 |
| LittleHopeLH3 | 2023-10-18 | E8_T09 | -35.9495 | -38.0425 | 1.0252 | 5.8055 | 1,491.3405 |
| LittleHopeLH3 | 2023-10-18 | E8_T10 | -35.9495 | -32.3556 | 1.7627 | 12.5074 | 5,524.1644 |
| LittleHopeLH3 | 2023-10-18 | E8_T11 | -35.9495 | -33.3791 | 1.6911 | 10.2995 | 4,364.2339 |
| LittleHopeLH3 | 2023-10-18 | E8_T12 | -35.9495 | -33.4297 | 1.7694 | 9.7303 | 4,313.7671 |
| LittleHopeLH3 | 2023-10-18 | E8_T13 | -35.9495 | -59.2725 | 0.7843 | 0.0572 | 11.2351 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| LittleHopeLH1 | 2023-10-30 | E8_T01 | -35.9495 | -54.3847 | 1.6464 | 0.1404 | 57.8745 |
| LittleHopeLH1 | 2023-10-30 | E8_T02 | -35.9495 | -51.1728 | 2.0181 | 0.2399 | 121.2498 |
| LittleHopeLH1 | 2023-10-30 | E8_T03 | -35.9495 | -46.4762 | 1.8581 | 0.7684 | 357.5563 |
| LittleHopeLH1 | 2023-10-30 | E8_T04 | -35.9495 | -46.5068 | 1.9861 | 0.7138 | 355.0400 |
| LittleHopeLH1 | 2023-10-30 | E8_T05 | -35.9495 | -49.4575 | 1.6834 | 0.4269 | 179.9733 |
| LittleHopeLH1 | 2023-10-30 | E8_T06 | -35.9495 | -46.8268 | 1.9198 | 0.6860 | 329.8229 |
| LittleHopeLH1 | 2023-10-30 | E8_T07 | -35.9495 | -47.1361 | 1.7846 | 0.6872 | 307.1513 |
| LittleHopeLH1 | 2023-10-30 | E8_T08 | -35.9495 | -52.1766 | 1.3922 | 0.2760 | 96.2277 |
| LittleHopeLH1 | 2023-10-30 | E8_T09 | -35.9495 | -53.0779 | 0.8058 | 0.3875 | 78.1927 |
| LittleHopeLH1 | 2023-10-30 | E8_T10 | -35.9495 | -56.9678 | 0.7942 | 0.1605 | 31.9284 |
| LittleHopeLH1 | 2023-10-30 | E8_T11 | -35.9495 | -65.4524 | 0.2295 | 0.0787 | 4.5261 |
No additional notes for this area.
Table. Summary of the 2023 Eastern Shore spawning ground acoustic survey data from all surveys and associated biomass estimates. A maximum biomass estimate value is taken when that are less than 10 days, instead, a single value is used in the reported biomass estimates for 10 day intervals.
| Location | Date | Interval (days) | Target Strength (dB/kg) | Area (km2) | Mean Sa (dB/m2) | Biomass (t) | Standard Error (t) | St. Err % |
|---|---|---|---|---|---|---|---|---|
| Eastern Shore #1 | 2023-09-23 | -35.9495 | 0 | -43.87 | 11,361 | 17 | 35 | |
| Eastern Shore #2 | 2023-10-03 | 10 | -35.6790 | 2 | -40.44 | 9,721 | 324 | 40 |
| Eastern Shore #3 | 2023-10-13 | 10 | -35.7290 | 1 | -44.87 | 4,452 | 15 | 12 |
| Eastern Shore #4 | 2023-10-27 | 14 | -35.9495 | 7 | -45.53 | 1,549 | 87 | 11 |
| Eastern Shore #5 | 2023-11-07 | 11 | -35.9495 | 0 | -33.34 | 973 | 417 | 54 |
| Summary | 2 | -41.61 | 28,057 | 2,099 | 7 |
Figure. Length distribution used for calculation of TS for the Eastern Shore acoustic surveys in 2023 with proportions <23cm and >30cm shown as white and grey bars.
Figure. Herring maturity samples collected during Eastern Shore surveys in 2023 to determine proportion of individuals spawning for Eastern Shore acoustic index of spawning stock biomass. Stage codes are: 1-2 Immature, 3-5 Ripening or Ripe. 6, Spawning, 7 Spent, and 8-9 Recovering.
Table. Summary of 2023 fish sampled for Eastern Shore by survey date and location with TS estimate from samples and TS estimate for a 28 cm herring using the length/weight equation.
| Location of survey | Interval (days) | Date | No. of Len. Samp. | No. of Det. Samp. | No. Len/Wt Fish | No. of Fish Measured | Mean Length (mm) | Mean Weight (g) | Target Strength (dB/kg) | Wt 28 cm Fish (g) | TS 28 cm Fish (dB/kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Eastern Shore #1 | Sep - 23 | -35.5000 | |||||||||
| Eastern Shore #2 | 10 | Oct - 3 | 2 | 2 | 59 | 331 | 280 | 169 | -35.2295 | 169 | -35.2295 |
| Eastern Shore #3 | 10 | Oct - 13 | 2 | 2 | 46 | 328 | 285 | 177 | -35.2795 | 167 | -35.1901 |
| Eastern Shore #4 | 14 | Oct - 27 | -35.5000 | ||||||||
| Eastern Shore #5 | 11 | Nov - 7 | -35.5000 |
NASC - Nautical Area Scattering Strength
Figure. Herring NASC’s by 2 nautical mile intervals during the 2023 Eastern Shore acoustic surveys.
SSB - Spawning Stock Biomass
Figure. Spawning Stock Biomass (proportional to size of a bubble plot) in thousands Eastern Shore acoustic survey by day in the year. Note that SSB on this figure have not been adjusted by the turnover equations and neighboring survey times may be temporally auto-correlated.
Work in Progress - Years with missing Bubbles have not been added to the database.
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| EasternShoreES1 | 2023-09-23 | ZP_T01 | -35.9495 | -46.5764 | 0.9681 | 0.2700 | 25.8660 |
| EasternShoreES1 | 2023-09-23 | ZP_T02 | -35.9495 | -49.0699 | 1.0399 | 0.1416 | 14.5675 |
| EasternShoreES1 | 2023-09-23 | ZP_T03 | -35.9495 | -51.7818 | 1.0119 | 0.0779 | 7.8017 |
| EasternShoreES2 | 2023-09-23 | ZP_T04 | -35.9495 | -50.1790 | 1.3185 | 0.3021 | 49.1106 |
| EasternShoreES2 | 2023-09-23 | ZP_T05 | -35.9495 | -45.9538 | 1.2756 | 0.8263 | 129.9253 |
| EasternShoreES2 | 2023-09-23 | ZP_T06 | -35.9495 | -44.3576 | 1.2014 | 1.2669 | 187.6348 |
| EasternShoreES2 | 2023-09-23 | ZP_T07 | -35.9495 | -56.6028 | 1.1145 | 0.0814 | 11.1892 |
| EasternShoreES2 | 2023-09-23 | ZP_T08 | -35.9495 | -54.5640 | 0.7539 | 0.1925 | 17.8927 |
| EasternShoreES2 | 2023-09-23 | ZP_T09 | -35.9495 | -49.3841 | 1.0307 | 0.4641 | 58.9746 |
| EasternShoreES2 | 2023-09-23 | ZP_T10 | -35.9495 | -53.1590 | 0.9634 | 0.2082 | 24.7273 |
| EasternShoreES2 | 2023-09-23 | ZP_T11 | -35.9495 | -57.1368 | 0.9372 | 0.0856 | 9.8945 |
| EasternShoreES2 | 2023-09-23 | ZP_T12 | -35.9495 | -56.1297 | 0.9263 | 0.1093 | 12.4769 |
| EasternShoreES2 | 2023-09-23 | ZP_T13 | -35.9495 | -54.1319 | 1.0284 | 0.1559 | 19.7642 |
| EasternShoreES3 | 2023-09-23 | ZP_T14 | -35.9495 | -54.2657 | 1.1794 | 0.0538 | 13.7940 |
| EasternShoreES3 | 2023-09-23 | ZP_T15 | -35.9495 | -52.0205 | 1.0875 | 0.0978 | 23.1322 |
| EasternShoreES3 | 2023-09-23 | ZP_T16 | -35.9495 | -51.7358 | 1.0087 | 0.1126 | 24.6993 |
| EasternShoreES3 | 2023-09-23 | ZP_T17 | -35.9495 | -52.0535 | 1.0289 | 0.1026 | 22.9571 |
| EasternShoreES4 | 2023-09-22 | EA_T01 | -35.9495 | -47.3147 | 7.2485 | 0.1342 | 945.1406 |
| EasternShoreES4 | 2023-09-22 | EA_T02 | -35.9495 | -49.5874 | 6.0765 | 0.0949 | 560.0440 |
| EasternShoreES5 | 2023-09-22 | EA_T03 | -35.9495 | -47.8499 | 2.0930 | 0.2333 | 71.7920 |
| EasternShoreES5 | 2023-09-22 | EA_T04 | -35.9495 | -46.0082 | 1.7032 | 0.4381 | 109.7079 |
| EasternShoreES5 | 2023-09-22 | EA_T05 | -35.9495 | -44.6970 | 1.9701 | 0.5122 | 148.3744 |
| EasternShoreES5 | 2023-09-22 | EA_T06 | -35.9495 | -49.6527 | 1.7971 | 0.1794 | 47.4015 |
| EasternShoreES6 | 2023-09-23 | EA_T07 | -35.9495 | -48.7729 | 2.9315 | 0.3569 | 349.0633 |
| EasternShoreES6 | 2023-09-23 | EA_T08 | -35.9495 | -45.9675 | 2.6660 | 0.7487 | 665.9509 |
| EasternShoreES6 | 2023-09-23 | EA_T09 | -35.9495 | -44.0364 | 2.9203 | 1.0662 | 1,038.8419 |
| EasternShoreES6 | 2023-09-23 | EA_T10 | -35.9495 | -43.2706 | 2.7120 | 1.3695 | 1,239.1710 |
| EasternShoreES6 | 2023-09-23 | EA_T11 | -35.9495 | -46.7182 | 2.7870 | 0.6025 | 560.2406 |
| EasternShoreES6 | 2023-09-23 | EA_T12 | -35.9495 | -48.1749 | 2.5665 | 0.4678 | 400.5890 |
| EasternShoreES6 | 2023-09-23 | EA_T13 | -35.9495 | -50.6178 | 2.3932 | 0.2859 | 228.2509 |
| EasternShoreES6 | 2023-09-23 | EA_T14 | -35.9495 | -51.5785 | 1.0665 | 0.5142 | 182.9533 |
| EasternShoreES7 | 2023-09-23 | OH_T01 | -35.9495 | -46.4708 | 2.0149 | 0.4797 | 365.5320 |
| EasternShoreES7 | 2023-09-23 | OH_T02 | -35.9495 | -46.2567 | 2.0221 | 0.5021 | 383.9999 |
| EasternShoreES7 | 2023-09-23 | OH_T03 | -35.9495 | -46.9167 | 3.0659 | 0.2845 | 329.8633 |
| EasternShoreES7 | 2023-09-23 | OH_T04 | -35.9495 | -49.9226 | 2.3339 | 0.1870 | 165.0966 |
| EasternShoreES7 | 2023-09-23 | OH_T05 | -35.9495 | -51.2854 | 1.4605 | 0.2184 | 120.6317 |
| EasternShoreES8 | 2023-09-23 | OH_T06 | -35.9495 | -50.3251 | 2.4791 | 0.2858 | 234.7513 |
| EasternShoreES8 | 2023-09-23 | OH_T07 | -35.9495 | -50.5602 | 2.6055 | 0.2576 | 222.3803 |
| EasternShoreES8 | 2023-09-23 | OH_T08 | -35.9495 | -48.5351 | 2.7507 | 0.3890 | 354.4973 |
| EasternShoreES8 | 2023-09-23 | OH_T09 | -35.9495 | -48.9991 | 2.9675 | 0.3240 | 318.5753 |
| EasternShoreES8 | 2023-09-23 | OH_T10 | -35.9495 | -49.5006 | 2.1413 | 0.4001 | 283.8290 |
| EasternShoreES8 | 2023-09-23 | OH_T11 | -35.9495 | -48.3822 | 2.1517 | 0.5151 | 367.1965 |
| EasternShoreES8 | 2023-09-23 | OH_T12 | -35.9495 | -47.4450 | 2.2348 | 0.6154 | 455.6353 |
| EasternShoreES8 | 2023-09-23 | OH_T13 | -35.9495 | -46.5755 | 2.0764 | 0.8092 | 556.6276 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| EasternShoreES1 | 2023-10-03 | VE_T01 | -35.679 | -46.5910 | 2.0556 | 0.1892 | 194.4883 |
| EasternShoreES1 | 2023-10-03 | VE_T02 | -35.679 | -42.4480 | 1.6913 | 0.5971 | 504.8925 |
| EasternShoreES1 | 2023-10-03 | VE_T03 | -35.679 | -49.3710 | 1.0523 | 0.1949 | 102.5417 |
| EasternShoreES2 | 2023-10-03 | VE_T04 | -35.679 | -51.4261 | 0.5396 | 0.2389 | 59.5147 |
| EasternShoreES2 | 2023-10-03 | VE_T05 | -35.679 | -49.6949 | 1.0471 | 0.1834 | 88.6625 |
| EasternShoreES2 | 2023-10-03 | VE_T06 | -35.679 | -44.4926 | 1.7133 | 0.3713 | 293.7457 |
| EasternShoreES2 | 2023-10-03 | VE_T07 | -35.679 | -48.4406 | 1.5410 | 0.1663 | 118.3505 |
| EasternShoreES3 | 2023-10-03 | VE_T08a | -35.679 | -51.1827 | 0.7507 | 0.2759 | 75.3664 |
| EasternShoreES3 | 2023-10-03 | VE_T08b | -35.679 | -48.9567 | 1.6859 | 0.2051 | 125.8286 |
| EasternShoreES3 | 2023-10-03 | VE_T09 | -35.679 | -43.6773 | 2.8693 | 0.4064 | 424.3419 |
| EasternShoreES3 | 2023-10-03 | VE_T10 | -35.679 | -48.3425 | 2.0481 | 0.1945 | 144.9431 |
| EasternShoreES4 | 2023-10-03 | OH_T01 | -35.679 | -55.9598 | 1.9589 | 0.1356 | 63.1168 |
| EasternShoreES4 | 2023-10-03 | OH_T02 | -35.679 | -53.5816 | 1.8652 | 0.2463 | 109.1357 |
| EasternShoreES4 | 2023-10-03 | OH_T03 | -35.679 | -52.0966 | 1.8927 | 0.3416 | 153.6261 |
| EasternShoreES4 | 2023-10-03 | OH_T04 | -35.679 | -55.5669 | 1.7259 | 0.1685 | 69.0932 |
| EasternShoreES4 | 2023-10-03 | OH_T05 | -35.679 | -50.7403 | 1.6097 | 0.5489 | 209.9421 |
| EasternShoreES4 | 2023-10-03 | OH_T06 | -35.679 | -53.1279 | 1.7891 | 0.2850 | 121.1522 |
| EasternShoreES4 | 2023-10-03 | OH_T07 | -35.679 | -49.6808 | 1.7508 | 0.6441 | 267.9440 |
| EasternShoreES4 | 2023-10-03 | OH_T08 | -35.679 | -53.0691 | 1.8539 | 0.2788 | 122.8044 |
| EasternShoreES4 | 2023-10-03 | OH_T09 | -35.679 | -49.8849 | 2.0933 | 0.5140 | 255.6441 |
| EasternShoreES4 | 2023-10-03 | OH_T10 | -35.679 | -49.8805 | 1.8572 | 0.5800 | 255.9006 |
| EasternShoreES4 | 2023-10-03 | OH_T11 | -35.679 | -51.3655 | 1.7690 | 0.4325 | 181.7934 |
| EasternShoreES4 | 2023-10-03 | OH_T12 | -35.679 | -51.6415 | 1.9186 | 0.3743 | 170.5995 |
| EasternShoreES4 | 2023-10-03 | OH_T13 | -35.679 | -52.9426 | 1.5036 | 0.3539 | 126.4329 |
| EasternShoreES4 | 2023-10-03 | OH_T14 | -35.679 | -54.8186 | 1.6632 | 0.2077 | 82.0860 |
| EasternShoreES4 | 2023-10-03 | OH_T15 | -35.679 | -52.4799 | 2.3531 | 0.2516 | 140.6470 |
| EasternShoreES4 | 2023-10-03 | OH_T16 | -35.679 | -58.7492 | 0.7361 | 0.1899 | 33.2052 |
| EasternShoreES5 | 2023-10-03 | OH_T17 | -35.679 | -47.8617 | 0.6317 | 0.4320 | 31.3799 |
| EasternShoreES5 | 2023-10-03 | OH_T18 | -35.679 | -38.4424 | 0.6153 | 3.8799 | 274.5227 |
| EasternShoreES5 | 2023-10-03 | OH_T19 | -35.679 | -41.2902 | 0.5222 | 2.3733 | 142.4955 |
| EasternShoreES5 | 2023-10-03 | OH_T20 | -35.679 | -44.3523 | 0.5578 | 1.0976 | 70.4031 |
| EasternShoreES5 | 2023-10-03 | OH_T21 | -35.679 | -41.9914 | 0.5966 | 1.7675 | 121.2481 |
| EasternShoreES5 | 2023-10-03 | OH_T22 | -35.679 | -41.5820 | 0.6087 | 1.9036 | 133.2349 |
| EasternShoreES5 | 2023-10-03 | OH_T23 | -35.679 | -47.1735 | 0.6254 | 0.5113 | 36.7677 |
| EasternShoreES5 | 2023-10-03 | OH_T24 | -35.679 | -74.3873 | 0.3532 | 0.0017 | 0.0698 |
| EasternShoreES6 | 2023-10-03 | ZP_T01 | -35.679 | -57.6066 | 1.2637 | 0.1732 | 33.8952 |
| EasternShoreES6 | 2023-10-03 | ZP_T02 | -35.679 | -57.1860 | 1.1219 | 0.2149 | 37.3413 |
| EasternShoreES6 | 2023-10-03 | ZP_T03 | -35.679 | -56.8822 | 1.5837 | 0.1633 | 40.0474 |
| EasternShoreES6 | 2023-10-03 | ZP_T04 | -35.679 | -56.5504 | 1.8337 | 0.1522 | 43.2266 |
| EasternShoreES6 | 2023-10-03 | ZP_T05 | -35.679 | -53.8916 | 1.9991 | 0.2576 | 79.7325 |
| EasternShoreES6 | 2023-10-03 | ZP_T06 | -35.679 | -53.4823 | 2.0005 | 0.2828 | 87.6118 |
| EasternShoreES6 | 2023-10-03 | ZP_T07 | -35.679 | -50.9530 | 2.0381 | 0.4970 | 156.8520 |
| EasternShoreES6 | 2023-10-03 | ZP_T08 | -35.679 | -49.0857 | 1.8301 | 0.8508 | 241.1132 |
| EasternShoreES6 | 2023-10-03 | ZP_T09 | -35.679 | -45.8543 | 1.7874 | 1.8333 | 507.4107 |
| EasternShoreES6 | 2023-10-03 | ZP_T10 | -35.679 | -45.2936 | 1.7387 | 2.1444 | 577.3460 |
| EasternShoreES6 | 2023-10-03 | ZP_T11 | -35.679 | -51.2469 | 1.6866 | 0.5613 | 146.5903 |
| EasternShoreES6 | 2023-10-03 | ZP_T12 | -35.679 | -50.9220 | 1.4811 | 0.6888 | 157.9770 |
| EasternShoreES6 | 2023-10-03 | ZP_T13 | -35.679 | -52.4601 | 1.4963 | 0.4785 | 110.8631 |
| EasternShoreES6 | 2023-10-03 | ZP_T14 | -35.679 | -54.2068 | 0.9210 | 0.5199 | 74.1509 |
| EasternShoreES6 | 2023-10-03 | ZP_T15 | -35.679 | -50.0141 | 1.3932 | 0.9026 | 194.7064 |
| EasternShoreES6 | 2023-10-03 | ZP_T16 | -35.679 | -52.4702 | 1.2879 | 0.5546 | 110.6050 |
| EasternShoreES6 | 2023-10-03 | ZP_T17 | -35.679 | -48.2291 | 1.4992 | 1.2650 | 293.6869 |
| EasternShoreES6 | 2023-10-03 | ZP_T18 | -35.679 | -52.4985 | 1.3032 | 0.5445 | 109.8857 |
| EasternShoreES6 | 2023-10-03 | ZP_T19 | -35.679 | -53.2957 | 1.8200 | 0.3245 | 91.4593 |
| EasternShoreES6 | 2023-10-03 | ZP_T20 | -35.679 | -55.2715 | 1.7489 | 0.2143 | 58.0294 |
| EasternShoreES6 | 2023-10-03 | ZP_T21 | -35.679 | -55.6730 | 2.2843 | 0.1496 | 52.9047 |
| EasternShoreES7 | 2023-10-03 | EA_T01 | -35.679 | -50.6340 | 1.2190 | 0.3100 | 94.6911 |
| EasternShoreES7 | 2023-10-03 | EA_T02 | -35.679 | -46.4120 | 2.2343 | 0.4471 | 250.3290 |
| EasternShoreES7 | 2023-10-03 | EA_T03 | -35.679 | -49.6578 | 2.2615 | 0.2092 | 118.5569 |
| EasternShoreES7 | 2023-10-03 | EA_T04 | -35.679 | -48.8383 | 3.1422 | 0.1818 | 143.1787 |
| EasternShoreES7 | 2023-10-03 | EA_T05 | -35.679 | -50.5371 | 2.9691 | 0.1301 | 96.8267 |
| EasternShoreES8 | 2023-10-03 | EA_T06 | -35.679 | -52.3277 | 1.0186 | 0.1888 | 27.8312 |
| EasternShoreES8 | 2023-10-03 | EA_T07 | -35.679 | -47.8064 | 1.1599 | 0.4696 | 78.8239 |
| EasternShoreES8 | 2023-10-03 | EA_T08 | -35.679 | -51.9189 | 1.0207 | 0.2070 | 30.5783 |
| EasternShoreES8 | 2023-10-03 | EA_T09 | -35.679 | -49.7276 | 1.0678 | 0.3277 | 50.6462 |
| EasternShoreES8 | 2023-10-03 | EA_T10 | -35.679 | -49.2593 | 1.0971 | 0.3553 | 56.4116 |
| EasternShoreES8 | 2023-10-03 | EA_T11 | -35.679 | -49.0000 | 1.2654 | 0.3270 | 59.8831 |
| EasternShoreES8 | 2023-10-03 | EA_T12 | -35.679 | -52.2882 | 0.7174 | 0.2705 | 28.0857 |
| EasternShoreES8 | 2023-10-03 | EA_T13 | -35.679 | -52.0578 | 0.7470 | 0.2740 | 29.6158 |
| EasternShoreES8 | 2023-10-03 | EA_T14 | -35.679 | -52.7435 | 0.7958 | 0.2196 | 25.2903 |
| EasternShoreES9 | 2023-10-02 | EA_T15 | -35.679 | -46.9552 | 0.7116 | 0.4285 | 32.5133 |
| EasternShoreES9 | 2023-10-02 | EA_T16 | -35.679 | -47.7679 | 0.7052 | 0.3585 | 26.9644 |
| EasternShoreES9 | 2023-10-02 | EA_T17 | -35.679 | -46.9064 | 0.6655 | 0.4633 | 32.8812 |
| EasternShoreES9 | 2023-10-02 | EA_T18 | -35.679 | -51.0159 | 0.6038 | 0.1982 | 12.7641 |
| EasternShoreES9 | 2023-10-02 | EA_T19 | -35.679 | -52.6466 | 0.6115 | 0.1345 | 8.7684 |
| EasternShoreES9 | 2023-10-02 | EA_T20 | -35.679 | -55.0151 | 0.5511 | 0.0865 | 5.0824 |
| EasternShoreES9 | 2023-10-02 | EA_T21 | -35.679 | -66.0390 | 0.2415 | 0.0156 | 0.4015 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| EasternShoreES1 | 2023-10-13 | ZP_T01 | -35.729 | -56.5323 | 0.7390 | 0.0797 | 8.2964 |
| EasternShoreES1 | 2023-10-13 | ZP_T02 | -35.729 | -55.5310 | 0.8711 | 0.0852 | 10.4476 |
| EasternShoreES1 | 2023-10-13 | ZP_T03 | -35.729 | -55.5285 | 0.6949 | 0.1069 | 10.4536 |
| EasternShoreES1 | 2023-10-13 | ZP_T04 | -35.729 | -54.9962 | 0.8000 | 0.1049 | 11.8166 |
| EasternShoreES1 | 2023-10-13 | ZP_T05 | -35.729 | -53.7075 | 0.7376 | 0.1531 | 15.8988 |
| EasternShoreES1 | 2023-10-13 | ZP_T06 | -35.729 | -53.7697 | 0.7089 | 0.1571 | 15.6729 |
| EasternShoreES1 | 2023-10-13 | ZP_T07 | -35.729 | -52.8460 | 0.6621 | 0.2080 | 19.3874 |
| EasternShoreES1 | 2023-10-13 | ZP_T08 | -35.729 | -55.4186 | 0.9727 | 0.0783 | 10.7216 |
| EasternShoreES1 | 2023-10-13 | ZP_T09 | -35.729 | -52.9203 | 0.9050 | 0.1496 | 19.0585 |
| EasternShoreES2 | 2023-10-13 | ZP_T10 | -35.729 | -50.7986 | 0.9197 | 0.3885 | 38.2784 |
| EasternShoreES2 | 2023-10-13 | ZP_T11 | -35.729 | -55.0258 | 0.9927 | 0.1360 | 14.4620 |
| EasternShoreES2 | 2023-10-13 | ZP_T12 | -35.729 | -61.9336 | 0.9240 | 0.0298 | 2.9475 |
| EasternShoreES2 | 2023-10-13 | ZP_T13 | -35.729 | -61.2380 | 0.7911 | 0.0408 | 3.4595 |
| EasternShoreES2 | 2023-10-13 | ZP_T14 | -35.729 | -56.5296 | 0.8618 | 0.1108 | 10.2294 |
| EasternShoreES2 | 2023-10-13 | ZP_T15 | -35.729 | -67.0376 | 0.8621 | 0.0099 | 0.9100 |
| EasternShoreES2 | 2023-10-13 | ZP_T16 | -35.729 | -54.7764 | 0.7263 | 0.1969 | 15.3169 |
| EasternShoreES2 | 2023-10-13 | ZP_T17 | -35.729 | -44.7544 | 0.7793 | 1.8440 | 153.9466 |
| EasternShoreES2 | 2023-10-13 | ZP_T18 | -35.729 | -44.1159 | 0.9568 | 1.7398 | 178.3283 |
| EasternShoreES2 | 2023-10-13 | ZP_T19 | -35.729 | -38.8493 | 0.9164 | 6.1080 | 599.6231 |
| EasternShoreES2 | 2023-10-13 | ZP_T20 | -35.729 | -40.2234 | 1.0268 | 3.9729 | 436.9910 |
| EasternShoreES2 | 2023-10-13 | ZP_T21 | -35.729 | -42.1635 | 0.9624 | 2.7115 | 279.5506 |
| EasternShoreES2 | 2023-10-13 | ZP_T22 | -35.729 | -66.0644 | 0.7627 | 0.0139 | 1.1386 |
| EasternShoreES3 | 2023-10-13 | VE_T01 | -35.729 | -39.5277 | 1.1172 | 1.2896 | 454.6537 |
| EasternShoreES3 | 2023-10-13 | VE_T02 | -35.729 | -33.8391 | 1.2408 | 4.3027 | 1,684.7997 |
| EasternShoreES3 | 2023-10-13 | VE_T03 | -35.729 | -50.1050 | 1.0970 | 0.1150 | 39.8065 |
| EasternShoreES4 | 2023-10-12 | EA_T01 | -35.729 | -67.6729 | 3.2708 | 0.0017 | 11.5966 |
| EasternShoreES4 | 2023-10-12 | EA_T02 | -35.729 | -52.2916 | 5.2505 | 0.0358 | 400.3702 |
| EasternShoreES5 | 2023-10-13 | EA_T03 | -35.729 | -58.9622 | 0.8021 | 0.0109 | 2.2007 |
| EasternShoreES5 | 2023-10-13 | EA_T04 | -35.729 | -60.5784 | 0.6579 | 0.0092 | 1.5168 |
| EasternShoreES5 | 2023-10-13 | EA_T05 | -35.729 | -65.1770 | 0.3806 | 0.0055 | 0.5261 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| EasternShoreES1 | 2023-10-27 | ZP_T01 | -35.9495 | -61.4024 | 1.1878 | 0.0794 | 20.5853 |
| EasternShoreES1 | 2023-10-27 | ZP_T02 | -35.9495 | -59.2347 | 1.6767 | 0.0927 | 33.9098 |
| EasternShoreES1 | 2023-10-27 | ZP_T03 | -35.9495 | -55.7065 | 2.0564 | 0.1703 | 76.4089 |
| EasternShoreES1 | 2023-10-27 | ZP_T04 | -35.9495 | -55.2161 | 1.6983 | 0.2309 | 85.5436 |
| EasternShoreES1 | 2023-10-27 | ZP_T05 | -35.9495 | -55.3671 | 2.2453 | 0.1687 | 82.6191 |
| EasternShoreES1 | 2023-10-27 | ZP_T06 | -35.9495 | -60.4810 | 1.8023 | 0.0647 | 25.4502 |
| EasternShoreES1 | 2023-10-27 | ZP_T07 | -35.9495 | -59.2096 | 1.6145 | 0.0968 | 34.1058 |
| EasternShoreES1 | 2023-10-27 | ZP_T08 | -35.9495 | -60.8692 | 1.6688 | 0.0639 | 23.2740 |
| EasternShoreES1 | 2023-10-27 | ZP_T09 | -35.9495 | -56.7537 | 1.9938 | 0.1380 | 60.0380 |
| EasternShoreES1 | 2023-10-27 | ZP_T10 | -35.9495 | -59.1817 | 2.0750 | 0.0758 | 34.3259 |
| EasternShoreES1 | 2023-10-27 | ZP_T11 | -35.9495 | -55.5660 | 2.5544 | 0.1416 | 78.9217 |
| EasternShoreES1 | 2023-10-27 | ZP_T12 | -35.9495 | -62.1362 | 1.9984 | 0.0399 | 17.3848 |
| EasternShoreES1 | 2023-10-27 | ZP_T13 | -35.9495 | -56.4118 | 2.6997 | 0.1103 | 64.9546 |
| EasternShoreES1 | 2023-10-27 | ZP_T14 | -35.9495 | -60.5578 | 1.2692 | 0.0903 | 25.0043 |
| EasternShoreES1 | 2023-10-27 | ZP_T15 | -35.9495 | -56.3724 | 2.1997 | 0.1366 | 65.5468 |
| EasternShoreES1 | 2023-10-27 | ZP_T16 | -35.9495 | -59.1806 | 2.1596 | 0.0729 | 34.3345 |
| EasternShoreES1 | 2023-10-27 | ZP_T17 | -35.9495 | -59.2670 | 2.2215 | 0.0695 | 33.6584 |
| EasternShoreES2 | 2023-10-27 | VE_T01 | -35.9495 | -47.8093 | 0.9031 | 0.3484 | 90.4438 |
| EasternShoreES2 | 2023-10-27 | VE_T02 | -35.9495 | -42.3047 | 1.2135 | 0.9209 | 321.2502 |
| EasternShoreES2 | 2023-10-27 | VE_T03 | -35.9495 | -46.0733 | 0.9558 | 0.4909 | 134.8895 |
| EasternShoreES2 | 2023-10-27 | VE_T04 | -35.9495 | -44.4785 | 0.9470 | 0.7153 | 194.7439 |
| EasternShoreES2 | 2023-10-27 | VE_T05 | -35.9495 | -56.7231 | 0.8085 | 0.0500 | 11.6144 |
| Location | Date | Transect Number | Target Strength (dB/kg) | Mean Sa (dB/m^2) | Distance (km) | Biomass Density kg/m^2 | Biomass (t) |
|---|---|---|---|---|---|---|---|
| EasternShoreES1 | 2023-11-07 | EA_T01 | -35.9495 | -51.0683 | 0.5740 | 0.1744 | 12.9727 |
| EasternShoreES1 | 2023-11-07 | EA_T02 | -35.9495 | -44.6776 | 0.6662 | 0.6547 | 56.5070 |
| EasternShoreES1 | 2023-11-07 | EA_T03 | -35.9495 | -35.5817 | 0.6757 | 5.2421 | 458.8673 |
| EasternShoreES1 | 2023-11-07 | EA_T04 | -35.9495 | -51.5143 | 0.7036 | 0.1284 | 11.7065 |
| EasternShoreES1 | 2023-11-07 | EA_T05 | -35.9495 | -38.6135 | 0.6348 | 2.7759 | 228.3003 |
| EasternShoreES2 | 2023-11-07 | VE_T01 | -35.9495 | -55.3703 | 0.5428 | 0.0641 | 10.3965 |
| EasternShoreES2 | 2023-11-07 | VE_T02 | -35.9495 | -57.4747 | 0.5224 | 0.0411 | 6.4038 |
| EasternShoreES2 | 2023-11-07 | VE_T03 | -35.9495 | -56.0431 | 1.3475 | 0.0221 | 8.9044 |
| EasternShoreES2 | 2023-11-07 | VE_T04FF | -35.9495 | -68.4903 | 0.6341 | 0.0027 | 0.5069 |
| EasternShoreES3 | 2023-11-07 | VE_T05a | -35.9495 | -62.8603 | 0.4566 | 0.0182 | 2.9369 |
| EasternShoreES3 | 2023-11-07 | VE_T05b | -35.9495 | -65.8032 | 0.4884 | 0.0086 | 1.4914 |
| EasternShoreES3 | 2023-11-07 | VE_T05c | -35.9495 | -55.1922 | 0.4547 | 0.1066 | 17.1672 |
| EasternShoreES3 | 2023-11-07 | VE_T06 | -35.9495 | -45.7490 | 1.7376 | 0.2454 | 151.0161 |
| EasternShoreES3 | 2023-11-07 | VE_T07 | -35.9495 | -59.5644 | 0.9340 | 0.0190 | 6.2731 |
No additional notes for this area.
This report was generated on: 2024-02-29 08:56:18
dplyr R
package version 1.1.2
kableExtra R package version 1.3.4
ggplot2 R package version 3.4.2
DT R package version 0.28
R
version 4.2.0 Patched (2022-05-30 r82437 ucrt)